.\ ‘ IIBRA R Y :Michigan State University gr 3 1293 10537 2266 This is to certify that the thesis entitled Hemispheric Activation as Measured by Conjugate Lateral Eye Movements: The Relationship Between Anxiety and Some Personality Variables To Eye Movement Direction presented by Melvin Berg has been accepted towards fulfillment of the requirements for Doctor of Philosophy degree in Psychology Date ////«5” 7 7 I l / 0-7639 l Bee—+83% i/Z\ HEMISPHERIC ACTIVATION AS MEASURED BY CONJUGATE LATERAL EYE MOVEMENTS: THE RELATIONSHIP BETWEEN ANXIETY AND SOME PERSONALITY VARIABLES TO EYE MOVEMENT DIRECTION By Melvin Berg A DISSERTATION Submitted to Michigan State University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Department of Psychology I977 ABSTRACT HEMISPHERIC ACTIVATION AS MEASURED BY CONJUGATE LATERAL EYE MOVEMENTS: THE RELATIONSHIP BETWEEN ANXIETY AND SOME PERSONALITY VARIABLES T0 EYE MOVEMENT DIRECTION By Melvin Berg The specialization of the left and right cerebral hemiSpheres for language and spatial processing, respectively, has been found to be reflected by conjugate lateral eye movements in subjects who are asked questions. The first eye movement following presentation of verbal problems tends to be to the right. Following spatial problems the first eye movement tends to be to the left. Theory suggests that during prob- len solving, activation of a cerebral hemisphere affects the frontal eye fields, stimulating eye movement to the contralateral direction. These results have been reported when the experimenter sits behind the subject (grbehind1§). When the experimenter faces the subject (Effacing-§), the results are different. Now, subjects tend to look con- sistently in one lateral direction. The suggested explanation is that individual subjects, irrespective of question type, use a preferred hemi- sphere and that these preferences are manifested as eye movements in the contralateral direction. Furthermore, an individual's personality is characterized by personality traits reflecting the functional attributes of that preferred hemisphere. For instance, right lookers demonstrate greater verbal than mathematical aptitude and display an analytical approach to problems. One suggested resolution of the discrepant results of these two paradigms emphasizes the effects of the experimenter's location on the subject. When the experimenter sits behind the subject, the subject is able to use the appropriate cognitive mode as indicated by the direction 3 of eye movements. However, when the experimenter faces the subject, the subject, made anxious by the interpersonal situation, falls back upon the use of a characteristic cognitive mode, mediated by either the left or the right hemisphere. Consequently, subjects tend to look consistent- ly in one direction. Hypothesis I: The directional consistency of eye A movements is a function of anxiety, irrespective of the type of problem being solved. Hypothesis II: Anxiety is related to experimenter location. Ego strength, defined as the capacity to maintain adaptive func- tioning under stress, appears to be related to the capacity to use the appropriate cognitive mode under stress. Hypothesis III: The capacity to use the appropriate cognitive mode in problem solving is associated with ego strength. The personality traits attributed to left movers are considered stereotypically feminine. Hypothesis IV: Left movers describe them- selves with more feminine sex stereotyped terms than right movers. Forty-eight male, right-handed subjects were asked verbal and spatial questions in three conditions -- Erbehind-§, §:facing-§, and stress. The stress condition consisted of an §:behind-§_arrangement during which the subject was urged to improve his performance, in order to arouse his anxiety. Contrary to expectations, it was found that verbal problems were followed by eye movements predominantly to the left while spatial items were followed predominantly by eye movements to the right. Spatial problems, furthermore, more frequently elicited staring than verbal problems. Hypothesis I was not confirmed, since the stress condition did not influence eye movements. Hypothesis II was not confirmed: Equivalent degrees of anxiety were reported in all conditions. Hypothesis III received partial confirmation: In the stress condition, ego strength was very modestly correlated to use of the appropriate cognitive mode. Hypothesis IV was not confirmed: Feminine identification was not associated with a preference fOr left looking. The finding that spatial problems elicit stares more frequently than verbal problems agrees with previous research. The finding that verbal problems are followed by eye movements to the left and spatial problems by eye movements to the right is incompatible with previous research. For my parents, friends, and teachers who have helped along the way. ii ACKNOWLEDGMENTS Looking back over the course of my graduate education and the development of this research project I am thankful to the mentors, supervisors, and friends who helped guide me in my growth as a psychologist, clinician, and person. I would like to warmly thank Dr. Joseph Reyher, Co-chairman of my dissertation committee, for sharing his enthusiasm for the science and practice of clinical psychol- ogy, and for his continuous support and steadfast friendship. I am grateful to Dr. Lauren Harris, Co-chairman of my dissertation committee, for his profound commitment to this project, his scientific acumen, and his delightful sense of humor. I owe thanks to Dr. Albert I. Rabin for his participation on my committee as well as for years of guidance, sensible advice, and solid teaching which expanded my horizons as a psychologist. I am grateful to Dr. Terrence Allen for his partici- pation on my committee, his statistical expertise, and his suggestions about all aspects of this research. I thank my research assistants, Mark Allen, Dale Buccilli, Paul Koch, Fran Levine, and Sharon Williams, for their generous commitment of time and energy. Finally, I thank Eric Olson for his help in writing the questions used in this study and for his help in administering the pre-test. TABLE OF CONTENTS PAGE LIST OF TABLES ........................ v LIST OF FIGURES ....................... vi INTRODUCTION ......................... 1 METHOD ............................ ll RESULTS ............................ 21 DISCUSSION .......................... 39 LIST OF REFERENCES ...................... 50 APPENDIX A. TEST FORMS ...................... 58 QUESTIONNAIRE ON HAND PREFERENCE ........... 70 C. BARRON EGO STRENGTH SCALE ............... 73 D. BEM SEX ROLE INVENTORY ................ 77 E. THE DEBRIEFING .................... 79 iv TABLES l. 10. ll. LIST OF TABLES Mean Percentage of First Eye Movements to the Right Made by Subjects on Verbal and Spatial Items in the Three Conditions ................. Analysis of Variance for Mean Percentage of First Eye Movements to the Right Made by Subjects, on Verbal and Spatial Items in Three Conditions ........ Mean Percentage of Duration of Right Looking by Subjects, on Verbal and Spatial Items, in the Three Conditions . . . . . . ........ . ....... Analysis of Variance for Mean Percentage of Duration of Right Looking by Subjects, on Verbal and Spatial Items, in the Three Conditions ............ Mean Anxiety Reported by Subjects in the Three Conditions . . .................... Analysis of Variance for Mean Anxiety Reported by Subjects in the Three Conditions ........... Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements, for the Three Conditions ...................... Analysis of Variance for Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements, For the Three Conditions ............... Analysis of Variance for Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements For the E88 and EFS Conditions ............ Analysis of Variance for Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements, For EFS and Stress Conditions ............ Analysis of Variance for Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements, For E85 and Stress Conditions ............ V PAGE 23 24 26 27 29 3O 32 33 35 36 LIST OF FIGURES FIGURE PAGE l. The Mean Percentage of Items on Which Subjects Made No Eye Movements in the E85 and EFS Conditions, for Order I: EBS Followed by EFS and Order II: EFS Followed by EBS ......... 38 vi INTRODUCTION In right-handed individuals, the left cerebral hemisphere serves verbal, analytic functions and the right henisphere serves spatial synthetic functions (Sperry, Gazzaniga and Bogen, 1969). In many left- handed individuals, the functional specialization of the cerebral hemi- spheres is less clearly lateralized (Hecaen and de Ajuriaguerra, 1964), and this also appears to be the case for females (Kimura, 1973). Knowledge about the functional specialization of the hemispheres was first established through the study of cognitive deficit in individuals suffering from unilateral cerebral damage (Broca, 1861; Wernicke, 1874; Reitan, 1955; Teuber, 1962; Milner, 1965, Corkin, 1965). The relation- ship between cognitive modes and the cerebral hemiSpheres also has been confirmed by research employing a variety of techniques on normal indi- viduals: dichotic listening (Kimura, 1967); average evoked responses (Buchsbaum, 1969): tachistoscopic viewing (Kimura, 1963). Recently another technique, developed by Kinsbourne (1972), has served to corroborate these earlier findings about the functional Special— ization of the cerebral hemispheres. This technique involves the moni- toring Of conjugate lateral eye movements. Conjugate Lateral Eye Movements as an Indicator of Hemispheric Activation Kinsbourne (1972) found that when the experimenter, seated behind the subject, presented verbal, spatial and numerical problems, the subject's lateral direction of eye movement, after question presentation, discriminated between the types of questions. Right-handed subjects tended to make eye movements to the right in response to verbal questions, and eye movements to the left in response to spatial questions, and no consistent directional pattern was found for numerical questions. Kinsbourne (1973) theorized that the frontal eye fields of each cerebral hemisphere control the direction of eye movements toward the contralateral direction. Extensive comparative studies of humans and lower primates have verified that the frontal eye fields mediate eye movements in the direction contralateral to the activated hemisphere (Crosby, 1953). Kinsbourne (1973) calls the cerebrum a "highly linked, integrated system with close interconnections," so that neural activation in an area of the cerebrum associated with thought processes, “overflows" into the frontal eye fields stimulating eye movement in the contralateral direction. Thus, as Kinsbourne's (1972) results bear out, concentration on verbal problems, mediated by the left henisphere, triggers eye move- ment to the right, and concentration on spatial problems, mediated by the right hemisphere, triggers eye movement to the left. The preponderance of stares, found after presentation of numerical problems, Kinsbourne attributed to the equal activation of both hemispheres required for the solution of these problens. In left-handed individuals, Kinsbourne (1972) did not find a rela- ; tionship between problen type and eye movement direction, a result con— sistent with the known heterogeneous distribution of cerebral functions in sinistrals (Hecean and de Ajuriaguerra, 1967). These different findings in sinistrals and dextrals provide support for the construct validity of conjugate lateral eye movements as an indicator of hemi- sphere activation. Unfortunately, Kinsbourne did not take sex of subject into account in his analysis. It is expected that females would show a lack of consistency in eye movement patterns like that found in sin- istrals, due to the less completely lateralized cerebral organization in females (Kimura, 1973). Studies similar to Kinsbourne‘s (1972) have provided supporting evidence for his theory. Kocel, Galin, Ornstein, & Merrin (1972) found that a combined group of verbal and numerical problems elicited more eye movements to the right than did a group of spatial and musical questions. Likewise, Weiten & Etaugh (1974) Showed that eye movement to the right is more likely in response to numerical questions than to music identification problens. Further convergent evidence is provided by Galin & Ornstein (1974), whose subjects made more eye movements to the right on verbal questions than on spatial questions. Galin & Ornstein also found more stares on spatial questions, which they attributed to the bilateral activation of the henispheres required when a spatial prob- lem is verbally presented, as was the procedure in their as well as in other studies. Ehrlichman, Weiner, & Baker (1974) performed a series of studies closely modeled upon those of Kinsbourne (1972) and Kocel et a1. (1972) and found a consistent though nonsignificant trend for eye movements to the right to occur after the presentation of spatial questions. These findings are inconsistent with Kinsbourne's (1973) theory relating problem type and eye movement direction to the known functional specialization of the cerebral hemispheres. Ehrlichnan et a1. (1974) gave no theoretical explanation of their findings. Consistent with Galin & Ornstein's data, Ehrlichman et al. (1974) found significantly more stares following spatial questions than after verbal questions. The replication of these findings provides some sup- port for Kinsbourne's (1973) theory. This mixture of confirming and disconfirming findings indicates that the use of lateral eye movements as an index of hemispheric activation needs further investigation. The phenomenon may be sensitive, easily influenced by as yet unidentified variables. Conjugate Lateral Eye Movements as a Correlate of Personality Variables Another line of research on conjugate lateral eye movement has used a different experimental paradigm, in which the experimenter and subject are seated facing each other. The results of these studies are different from the studies reviewed above in which the experimenter sits behind the subject. In the course of doing psychotherapy, Teitlebaum (1954) noticed that his patients characteristically looked in one direction, either left or right while they reflected on a problem. In formal investigations, Day (1964a, 1967a, 1967b) confirmed that in response to problems, people demonstrate consistent eye movement patterns either to the left or the right. The reliability of this individual con- sistency in the directional preference of eye movement has been established (Duke, 1968; Etaugh & Rose, 1973). Day (1967a) also found that right movers appeared to have an external locus of attention, are alert and reactive to the external, visually perceived environment, and identify anxiety as emanating from external events. For example, the right looker might report “It was a dull place, so I went for a walk." Left lookers appeared to have an internal locus of attention, to rely upon subjective experience, and to locate anxiety as emanating from internal, subjective events. For example, the left looker might report, "I was anxious and troubled by disturbing thoughts and feelings and I left hoping to get distracted." Gerdes & Kinsbourne (1974) have provided supporting evidence that right movers describe anxiety states with reference to external cues and events. In a series of studies, Bakan (1969) showed that left movers are more hypnotizable, more often major in the humanities, have clearer visual imagery, and score higher on the verbal than on the quantitative section of the Scholastic Aptitude Test (SAT). In contrast, right movers were more likely to score higher on the quantitative section of the SAT, prefer to major in the physical sciences, and have less clear visual imagery. The comparison of left movers and right movers with regard to attention has been studied from several perspectives with convergent results. Bakan & Shotland (1969) found that right movers readfaster and . demonstrate superior ability to maintain visual attention. The greater reliance upon external attention in right movers was supported by their production of a lower percentage of Alpha on EEG recordings than left movers (Bakan & Svorad, 1969). Employing two-self report measures of ; inner attentiveness and daydreaming, Meskin & Singer (1974) reported that left lookers are more attentive to subjective experience. Our & Reyher (1973) showed that left movers score higher on a hypnotic suscep- tibility scale emphasizing inner experience, while right movers score higher on a scale emphasizing external experience. Bakan (1969) speculated that the consistency of eye movement is "symptomatic" of easier triggering in the henisphere contralateral to eye movement. Thus, the personality of the right mover is more likely to reflect the style and dominant cognitive operations of the left heni- sphere, whereas the personality of the left looker reflects the style and dominant cognitive operations of the right henisphere as: prelogical, intuitive, subjective, emotional, global, synthetic, diffuse, and best suited for spatial problems. He characterizes the functioning of the left hemisphere as: objective, analytical, rational, and best suited for verbal problems. The greater reliance upon or easier "triggering" of one of the hemiSpheres results in a variety of individual personality characteristics related to the mode of cognitive functioning mediated by that particular hemisphere. The Relevance of Experimenter Location in Research on Lateral Eye Movement TWO apparently inconsistent lines of research regarding lateral eye movements emerge. The studies baSed upon the experimenter-behind- subject paradigm generally show that the direction of eye movement is a function of the type of question presented (Kinsbourne, 1972: Kocel, Galin, Ornstein, & Merrin, 1972: Galin & Ornstein, 1974), whereas the research using the experimenter-facing-subject paradigm shows that individuals con- sistently look in one direction and that this tendency is associated with a cluster of internally consistent personality characteristics (Day, 1964, 1967a, 1967b; Gerdes & Kinsbourne, 1974; Bakan & Svorad, 1969; Meskin & Singer, 1974: Gur & Reyher, 1973). R. E. Gur (1973) attempted to clarify the inconsistency between these two lines of research by using both procedures, the experimenter- behind-subject and the experimenter-facing-subject paradigms on the same group of subjects. She confirmed both the findings of Bakan (1969) and Kinsbourne (1972), suggesting that experimenter location was the critical difference between their procedures. She proposed that when the experi- 5 menter faces the subject, the subject is made anxious and is distracted from the nature of the task. The subject then falls back upon the use of a particular cognitive mode, mediated by one of the cerebral hemi- spheres. She suggested that anxiety is generated by the face-to-face interpersonal situation which poses a threat to self-esteem. Jourard and Friedman (1970) found that subjects disclose more about themselves when the experimenter is absent than when facing the subject. Subjects feel observed in interviews and are made anxious by the possibility of receiv; ing responses threatening to their self-esteem (Argyle, 1969). The determination whether arousal of anxiety is the crucial variable under- lying experimenter location will be explored in this study. The follow- ing hypotheses will be tested: Hypothesis I: The directional consistency of eye movements is a function of anxiety, irrespective of the type of problem being solved. Hypothesis II: Anxiety is a function of experimenter location. The Examination of Further Personality Characteristics Associated with Directional Preference of Lateral Eye Movement: Ego Strength and Sex Role Identification Ego Strength. Use of the appropriate mode of cognitive function- ing, or the hemisphere best suited to a particular problem, while the individual is under stress, is adaptive, for it should permit optimal problem solving performance. It is expected that the trait of ego strength is reflected in a tendency to use the appropriate hemisphere while under stress. Ego strength is defined by Fenichel (1945) as the capacity to maintain objective perception and to resist the disturbing influence of affect upon intellectual operations and judgment. In his definition of ego strength, Lazarus (1966) emphasizes the capacity to withstand stress and maintain adaptive forms of coping, so that the appropriate modes of thought are used to suit the demands of the situation. Freedom from the disturbing influence of stress upon adaptive functioning appears to be the common element emphasized by other investigators of ego strength (Ehrenwald, 1966; Karush, Easser, Cooper, & Swerdloff, 1966). In fact, the largest categories of items on the Barron Ego Strength Scale (1953) refer to physiological stability and freedom from disturbance by anxiety. By virtue of the high frequency of its use, the Barron Scale has come to define the trait of ego strength in the empirical literature. Research has consistently Shown that ego strength is assOciated with physiological stability and the ability to cope with stress (Alexander, Roessler, & Greenfield, 1963; Greenfield, Alexander, & Roessler, 1963). Thus theoretical conceptualization and empirical studies suggest that a major component of ego strength is the capacity to cope with stress. It is expected that ego strength is associated with the capacity to use the apprOpriate hemisphere (left hemisphere for verbal problems and the right henisphere for spatial problems) as indicated by the direction of lateral eye movement during problem solving. Hypothesis III: The capacity to use the appropriate cognitive mode, in problem solving, as indexed by the direction of eye movement, is associated with ego strength. Identity. The various personality characteristics associated with left movers and the cognitive style attributed to the right hemi- sphere appear to have a stereotypic feminine connotation: hypnotizability, preference for the humanities, higher verbal ability than quantitative ability, and an intuitive, subjective approach to problems. Those traits associated with right lookers and the left henisphere appear to have a stereotypic masculine connotation: preference for the physical sciences, higher quantitative ability than verbal ability, and an objec- tive, analytical approach to problems. Several studies (Fernberger, 1948: Jarrett & Sheriffs, 1953: Rosenkrantz, Bee, & Vogel, 1968) have found that male and female subjects stereotype females as: emotional, sensitive to inner experience, subjective, intuitive, interested in the humanities. Males were stereotyped as: objective, relatively unemotion- al, preferring the physical sciences, and analytical. In line with these stereotypic patterns, Lopiccolo & Blatt (1972) demonstrated that males with relatively prominent features of feminine identification have 10 a preference for an intuitive, stereotypic feminine cognitive style. Whether the association of feminine identification and the preference for a stereotypic feminine cognitive style is a result of feminine iden- tification arising from a natural ability in stereotypic feminine interest areas or whether a feminine identification fosters the adop- tion and development of stereotypical feminine interests and modes of thought is unknown. Nevertheless, it is expected that, on the basis of the relationship between identity and cognitive style found by Lopiccolo & Blatt (1972), males who are left movers should describe themselves with more feminine terms than right movers. It is assumed that attribution of adjectives generally thought of as descriptive of a particular sex indicates identification with that sex. Hypothesis IV: Left movers describe themselves in relatively more feminine sex stereotyped tenms than right movers. METHOD Subjects Forty-eight right-handed males were drawn from introductory psychology classes at Michigan State University. It was decided to use only male subjects since the functional specialization of the cerebral hemispheres appears to be more clearly lateralized for males than females (Kimura, 1973). A 20-item questionnaire (Humphrey, 1951) measuring hand usage in everyday tasks was administered, so as to select subjects with right hand dominance (use of the right hand in 18 of the 20 everyday tasks, including writing and throwing a ball). The use of subjects with right hand dominance increases the probability 1 of left cerebral henisphere dominance for speech. Materials Development and selection of items. An initial item pool con- sisting of 72 verbal and 72 spatial questions was developed. These prob- lems were written in an attempt to develop verbal items that require a minimum of imagery for solution, and spatial items that necessitate the use of imagery for solution. The verbal questions consisted Of 24 of each sub-type: word analogies, finding synonyms, and finding a word to match a definition. The spatial items consisted of questions requir- ing the description of spatial relationships between familiar objects, the imagined physical transformation of familiar objects, the description of geographic areas on a map, and the description of familiar locales. ll 12 Three pretest forms were developed by the random assignment of eight verbal and eight spatial items from each of the three subtypes. Each form consisted of 48 itens, 24 spatial, and 24 verbal items. On each form a verbal and a spatial item were paired, forming a block, and within each block the order of the itens was randomized. The pre- test subjects were 58 men and 40 women drawn from introductory psychol- ogy classes. They were instructed to answer each item and rate each on a five point scale for the amount of imagery used in the solution of the problem. The mean imagery rating was determined for each item. 0n the basis of these ratings, the 60 verbal questions with the lowest imagery ratings and the spatial questions with the highest imagery ratings were selected for use in the experiment. Itens were selected on the basis of the ratings by the males, but when items had identical ratings, the ratings by the females were used instead to determine the superior item. Selection of spatial items with the highest mean imagery ratings was presumed to maximize the likelihood that subjects would use a wholistic and synthetic cognitive mode most characteristic of the right hemisphere. Conversely, using verbal items with the lowest mean imagery ratings was presumed to maximize the likelihood that subjects would use an analytical cognitive mode most characteristic of the left hemisphere. The 120 test questions selected were assigned to one of six equi- valent forms, each consisting of 20 items, in the following manner. Ten items from the verbal and spatial_categories were randomly assigned to each form of the test. On each form, a verbal and a spatial item were paired, and within each pair the order of the questions was randomized. (These forms appear in Appendix A.) During each of the three 13 experimental sessions, two forms were administered. The forms were presented in an order counterbalanced across subjects. Apparatus. Subjects were tested in a 15 x 9 foot (4.52 x 3.04 m) room whose walls were covered with black cloth to assure a homogeneous visual field. The subjects sat in a reclining lounge chair with a high backrest. Two 6 x 6 x 3 in. (15.24 x 15.24 x 7.62 cm) foam pads were attached to the backrest of the lounger at head level to keep the subject's head in a steady, forward position. A video camera was mounted in the middle of the wall directly facing the subject. The lens of the camera was placed through a 3 x 3 in. (7.62 x 7.62 cm) hole in the cloth. Eye movements were observed on a television monitor in another room. A Hewlett Packard digital recorder was used to record the dura- tion of eye position at midline and movements to the left and the right. Three pens on the digital recorder were controlled by different switches for eye movement to the right, midline, and left. These switches were operated by observers. A fourth pen, used to indicate the beginning and end of a problem solution period, was controlled by a switch operated by the experimenter. The Hand Usage Questionnaire (Humphrey, 1951) was used to assess handedness. (See Appendix B.) The State-Trait Anxiety Inventory (Spielberger, Gorsuch, & Lushene, 1970) was used as a measure of anxiety. The Barron Ego Strength Scale (Barron, 1953) was used to test Hypothesis III: The capacity to use the appropriate hemisphere in problem solving is associated with ego strength (See Appendix C). 14 The Bem Sex Role Inventory (1974) was used to test Hypothesis IV: Left movers describe thenselves in relatively more feminine sex stereo- typed terms (see Appendix D). Procedure Subjects participated in three conditions: experimenter-facing- subject, experimenter-behind-subject, and the interpersonal stress procedure. Order of the experimenter-facing-subject and experimenter- behind-subject procedures was counterbalanced. All subjects received the stress condition last. All the experimenters were men, and those in the first two conditions were casually dressed undergraduates. Introduction to the experiment. [Upon being seated in the experimental room the subject was instructed as follows: “Have you ever participated in a psychology experiment before? (The subject is permitted to answer.) In this research we are studying how people answer questions under various circumstances. We are also interested in how actual behavior relates to problem solving and per- sonality. Thus I will be asking you a series of short questions. Secondly, I will ask you to fill out, by yourself, some standard personality questionnaires which require a very brief response. AS you see, this is an observation room; however, the windows have been covered. For the purpose of this study we will be monitoring your behavior, just through this camera, but a permanent video recording will not be made. 15 We are merely interested in seeing how people actually do behave when they answer questions. Please read this consent form, which is a depart— mental requirement for everybody participating in research. If you agree to the conditions, please sign and we will begin." Orientation to the apparatus. The subject was asked to sit in the lounge chair and then was further instructed: "If you have ever worked with a T.V. camera, you know how difficult it is to keep people in focus when they are moving, so I would like you to rest your head between the foam pads, which will hold your head from moving too much. It is your body which we want to be steady, so you may glance around if you wish. Since we need to have you within full view of the camera, I will adjust your chair to the best possible position. Try to get yourself into a comfortable position so that the camera can be set." Administration of the problems. Depending upon the condition, the experimenter was seated either across the table, directly facing the sub- ject or in a chair five feet (1.52 m) behind the subject. The subject was further instructed as follows: "I am going to read a series of questions to you. Listen carefully to each question. I will give you 10 seconds to think about the answer after I read the question. Then I will say 'answer' and I would 16 like you to give me the answer then. You will probably find some of the questions easy and some more difficult. If you do not know the answer merely say 'I don't know.' I will be using this switch in order to keep track of the questions. Keep your eyes open while answering and thinking about the questions. Do you have any questions?" Upon reading the first word of each question the experimenter depressed a button, which controlled a pen on the digital recorder, signifying that a new trial had begun. Eye movements were scored by one of two trained observers watching the eye movements on a television monitor. The observer was seated in an adjacent room. Upon the first word of the question, the observer began to score by depressing Switches for the duration of movements to the right, left or no movement at midline. He continued to score eye movements until the subject gave his response. After two test forms had been administered, the subject was given the State-Trait Anxiety Inventory (Spielberger, Gorsuch & Lushene, 1970), and the experimenter told the subject: "Now I would like you to fill out this short ques- tionnaire. During this period your behavior will not be monitored.‘ Listen as I read the instructions. "A number of statenents which people have used to describe themselves are given below. Read each statenent and then circle the appropriate number to the right of the statenent to indicate how 17 you feel right now, that is, at this moment.‘ I will leave the room, while you fill this out and return in about four minutes." The experimenter then left the room and returned in four minutes. When he returned, he instructed the subject: "Now I would like you to answer some more questions. I am going to sit over here for this group of questions." Depending upon which condition was being administered, the experi- menter was seated in his appropriate chair and administered two more forms of the test. After answering the questions, the subject was given the anxiety inventory once again, in the manner described above. Administration of Personality Inventories. After the subject completed the anxiety inventory he was taken to a small room and instructed: “I would now like you to fill out these brief per- sonality questionnaires. These are commonly used to get a personality description. Please fill them out in the order marked at the top of the questionnaire: 1, 2, 3. Read over the instructions to each one now and I will answer any questions you might have. Here are some pencils and remember to fill them out in the proper order. You will have 45 minutes to complete these. If you finish early, please wait patiently until I return." 18 The subject was given the following tests to complete in this order: Hand Preference Questionnaire (Humphrey, 1951), Bem Sex Role Inventory (Bem, 1974), and the Ego Strength Scale (Barron, 1953). Administration of the stress condition. In this condition, another experimenter was used. This experimenter was older and formally dressed in a white shirt, tie, and lab coat in an attenpt to give a more inthnidating appearance than the other experimenters. After 45 minutes this experimenter entered the room and introduced himself: "Hello, I am Dr. , the supervisor of this research. Have you completed these questionnaires? I would like you to come to the experimental room with me, where I would like to ask you some more questions." After entering the experimental room, the experimenter and the subject were seated in two adjacent chairs. While looking at some papers in his folder, the experimenter explained. "We scored your performance on the tests which you took with my assistant, and we would like you to try harder. Ordinarily undergraduates are able to answer these questions with a high degree of accuracy. Did you find the earlier questions too hard? (The subject is given an opportunity to respond to this and the following questions by the examiner.) How old are you? Do I have your name Spelled correctly? What is your major? What is your G.P.A.? Do you expect to get a bachelor's degree? We want to give you 19 some more questions, in order to get a clearer picture of what your performance on these items is really like. Pay very close attention, because each error lowers your score. Try your very best." The subject was seated in the lounge chair and instructed as follows: "I am going to read a series of questions to you. Listen carefully. I will give you 10 seconds to think about the answer after I read the question. Then I will say 'answer' and I would like you to give me the answer then. If you do not know the answer, merely say, 'I don't know'. Keep your eyes open while answering and thinking about the questions." The experimenter was seated in a chair one ft. (.30 m) directly behind the subject. The experimenter responded to the subject's answer to every third item with the following six comments: "Are you sure?; These do seem hard; Close; Hmm; Try your best; Almost." The subject was given an opportunity to respond to these comnents, but the experi- menter did not respond further. Thus within the first 15 problems six comments were made. After the two forms had been completed, the anxiety inventory was given in the manner described above. Debriefing. After the experimenter returned to the room, the experimenter and subject were seated in the two adjacent chairs, and the subject was debriefed as follows: 20 "Now that the experiment is over, I would like to tell you about the purpose of some of the things we have done, and set your mind at ease. First we did not score your performance on the questions, which the first experimenter gave to you. Secondly, although I told you that I would like you to try harder, implying that your performance was in some way not up to par, and though I made some critical coments after some of your responses, this was in no way a reflection upon the quality of your performance. In fact all subjects who participate in this experiment are asked the same questions and told the same things. My instructions to you were designed to help assess the effects of implied negative feedback and stress upon your behavior. Iam sorry if any of my state- ments were in any way disturbing. Let me make clear that my behavior and statements were intended to be stress inducing and did not reflect anything about your performance." At this point the experimenter encouraged the subject to express any feelings associated with the experiment, permitting him to ventilate feelings of annoyance and concerns over decreased self-esteem. The purpose of the experiment was described, as well as relevant background information. The subject was encouraged to ask questions. See Appendix E for further details about the debriefing. RESULTS Reliability of Observers The reliability of the two observers was determined after approximately 5 hours of practice with pilot subjects. The two observers, making independent ratings, agreed upon the direction of the first movement on 85% of the items. With respect to the rating of all eye movements, when movement was seen simultaneously by both observers, there was agreement upon the direction of the movement in 98% of these cases. Again with respect to the rating of all eye movements, there was agreement that eye movement had occurred in 87% of all eye movements scored. Anxiety and the Directional Consistency of Eye Movement Hypothesis I states that the directional consistency of eye movements is a function of anxiety irrespective of the type of problen being solved. It was expected that the mean percentage of right look- ing would be greater on verbal items than on spatial items in the Efbehind §_(EBS) condition, but that no such difference would be found in the Eefacing-§_(EFS) and stress condition. The mean percentages of first eye movements to the right, of items on which there was movement, for the three conditions and two orders of presentation (EBS followed by EFS or EFS followed by EBS) are presented on Table l. The probabil- ities of the significance of differences for the main effects and 21 22 interactions, as determined by analysis of variance, ranged from p < .13 for Question Type (verbal vs. spatial) to p4 .99 for Question Type X Order. A summary of the analysis of variance appears in Table 2. Hypothesis I was not supported.. The experimental manipulations failed to influence eye movements. Furthermore, the direction of eye movements failed to distinguish between question type in all three con- ditions. At most there was a nonsignificant trend for right looking to follow spatial questions and for left looking to follow verbal questions. The data next were examined in terms of the total duration of all directional eye movements during the period before the question was answered. For each item, from the total amount of time of directional. looking (left or right), the percentage of time looking to the right was computed. Thus the unit of analysis is the percentage of duration of right looking. The means for this analysis are presented in Table 3. The probabilities of the significance of these differences for the main effects and interactions as determined by analysis of variance ranged from p 4. .04 for: Question Type (verbal vs. spatial) to p 4 .95 for Order. A summary of the analysis of variance appears in Table 4. Again, Hypothesis I failed to be supported. The three conditions did not have different effects on eye movements. Significantly more right looking was found to occur on spatial questions than on verbal questions. Reciprocally, this indicates that significantly more left looking occurred on verbal items. Thus the relationship between question type and direction of eye movement was the reverse of what was expected. 23 TABLE 1 Mean Percentage of First Eye Movements to the Right Made by Subjects on Verbal and Spatial Itens in the Three Conditions Order of Administration I: EBS Followed by EFS Verbal Itens Spatial Items Conditions X SD 7 SD ‘ EBS 43.50 24.58 46.24 28.15 EFS 46.28 30.87 45.62 31.54 Stress 41.42 30.68 48.20 28.76 r Order of Administration II: EFS Followed by EBS EBS 45.34 29.96 49.62 28.84 EFS 39.85 29.86 47.18 30.84 Stress 52.41 28.62 49.60 26.67 EBS= experimenter-behind-subject condition. EFS= experimenter-facing-subject condition. Stress= stress condition. 24 TABLE 2 Analysis of Variance for Mean Percentage of First Eye Movements to the Right Made by Subjects, on Verbal and Spatial Itens in Three Conditions Source df Ms F Order (0) l .03 .09 Error 46 .35 Conditions (C) . Contrast I 1 .OO .00 Error 46 .05 Contrast II 1 .05 1.05 Error 46 .05 C X 0 (Contrast I) X 0 1 .OO .02 Error 46 .05 (Contrast II) X 0 l .09 1.93 Error 46 .05 Question Type (O) 1 .06 2.33 Error 46 .03 Q X 0 1 .OO .00 Error 46 .03 C X 0 (Contrast IV) X 0 1 .OO .08 Error 46 .Ol (Contrast V) X 0 1 .OO .08 Error 46 .02 C X 0 X 0 (Contrast IV) X 0 X 0 l .00 .15 Error 46 .Ol (Contrast V) X 0 X 0 1 .06 2.00 Error 46 .03 Contrasts I = C1-EC2+C3)/2 C1=EBS II = C - C +C 3/2 , C2=EFS III = vérbai (Y - Spatial (S) C3=Stress IV = C1V-C15-CZV+CZS-C3V+C3S v - -c]v+c]S+CZV-CZS-C3V+C3S Experimenter_Location and Anxiety Hypothesis II states that anxiety is a function of experimenter location. It was expected that the mean self-reported anxiety in the EFS condition would be higher than in the EBS condition. Secondly, it was expected that anxiety in the stress condition would be higher than in the EFS condition. The mean self-reported anxiety ratings are reported in Table 5, for the two orders of presentation. The mean anxiety ratings for Order 1 (EBS followed by EFS) were 44.50 for E85 and 44.42 for EFS and for Order II (EFS followed by EBS) the mean for EBS was 40.63 and 41.46 for EFS. These anxiety ratings are comparable to ratings made by male college students, while taking an intelligence test, for whom the mean rating was 43.01 (Spielberger, Gorsuch & Lushene, 1970). The mean anxiety ratings in the stress condition were 49.71 in Order I and 48.00 in Order 11. These anxiety ratings are comparable to those obtained from male college students, after viewing a stressful movie (depicting accidents in a woodworking shop), for whom the mean was 50.03 (Spielberger, Gorsuch & Luthene, 1970). The range of probabilities of differences for the main effects and interactions is from p 2;.0002 for Conditions (Stress - E§§-;-§E§) to p.¢..72 for Order x Conditions. The analysis of variance appears in Table 6. The difference between the mean anxiety ratings for the EBS and EFS conditions was nonsignificant by analysis of variance. Hypothesis II was not confirmed, though self-reported anxiety was significantly 26 TABLE 3 Mean Percentage of Duration of Right Looking By Subjects, on Verbal and Spatial Items, in the Three Conditions Order of Administration I: EBS Followed by EFS Verbal Items Spatial Items Conditions X so x SD EBS 48.38 22.15 50.70 26.35 EFS 46.59 27.26 49.33 30.76 Stress 46.79 24.86 53.39 27.37 Order of Administration 11: EFS Followed by EBS EBS 46.80 27.72 53.26 27.32 EFS 39.70 28.03 48.71 29.72 Stress 50.91 26.54 53.47 26.73 EBS= experimenter-behind-subject condition. EFS= experimenter-facing-subject condition. Stress= stress condition. 27 TABLE 4 Analysis of Variance for Mean Percentage of Duration of Right Looking by Subjects, on Verbal and Spatial Items, in the Three Conditions Source df Ms F Order (0) l .00 .00 Error - 46 .31 Conditions (C) Contrast I l .01 .23 Error 46 .04 Contrast II 1 .12 3.00 Error 46 .04 C X 0 (Contrast I) X 0 1 .OO .07 ' Error 46 .04 (Contrast II) X 0 1 .04 1.04 Error 46 .04 Question Type (O) 1 .18 4.67* Error 46 .04 Q X 0 1 .OO .21 Error 46 .04 C X 0 (Contrast IV) X Q 1 .OO .12 Error 46 .01 (Contrast V) X 0 1 .OO .22 Error 46 .01 C X Q X 0 (Contrast IV) X Q X 0 1 .OO .41 Error 46 .Ol (Contrast V) X 0 X 0 1 .03 3.00 Error 46 .01 * p.‘:.OS Contrasts I= Cl“ (C2+C3)/2 C]— =EBS II= c2 +c ag/z c2= -EFS III= Verbal( -Spatial (S) C3=Stress IV= C1V-C1S-(C2V+C25-C3V+C3S V= -C V +C S+C V-CZS-C V+C S l 1 2 3 3 28 higher in the stress condition than in the other two conditions as was predicted. Ego Strength and the Use of the Cerebral Hemispheres Hypothesis III states that the capacity to use the appropriate cognitive mode as indexed by the direction of eye movements during prob- lem solving is associated with ego strength. Within the three conditions, the correlation of ego strength and the total number of first eye move- ments in the appropriate direction (right on verbal questions and left on y Spatial questions) was determined. Pearson correlations were: r = -.10 (p< .25) for the EBS condition, r = .25 (p 4 .04) for the stress condi- tion, and r = .20 (p ¢:.45) for the EFS condition. Thus Hypothesis III received only weak support. Sex Role Identity and Left Looking Hypothesis IV States that left movers describe themselves in rela- tively more feminine sex stereotyped terms than right movers. The hypo- thesis received no support. Pearson correlation of the scores on the Dem Sex Role Inventory (BSRI) with the percentage of items for which the subject's first eye movement was to the left was r:§..09. The correla- tion of the BSRI with the percentage of time looking to the left, or the total amount of time spent looking in either direction was rsfi..Ol. As a third test of the hypothesis, subjects were identified as either left movers or right movers if 70% or more of their first eye movements were to the left or the right, the criteria used in previous research (Our, 1973). By this criterion 11 subjects were classified 29 TABLE 5 Mean Anxiety Reported by Subjects in the Three Conditions Order I: EBS Followed by EFS Conditions X SD EBS 44.50 7.56 EFS 44.42 8.53 Stress 49.71 10.52 Order II: EFS Followed by EBS EBS 40.63 7.97 EFS 41.46 7.74 Stress 48.00 11.34 EBS= experimenter-behind-subject condition. EFS= experimenter-facing-subject condition. Stress= stress condition. 30 TABLE 6 Analysis of Variance for Mean Anxiety Reported by Subjects in the Three Conditions Source df MS F Order (0) 1 291.84 1.95 Error 46 149.60 Conditions (C) Contrast I 1 1192.34 17.49* Error 46 68.18 Contrast II 1 3.38 .12 Error 46 29.19 0 X C (Contrast I) X 0 l 23.35 .34 Error 46 68.17 (Contrast II) X 0 l 5.04 _.17 Error 46 29.19 * p ¢L.001 Contrasts I= Stress-(EFS-EBS)/2 II= EFS-EBS 31 as right movers and 13 as left movers with the remaining 24 subjects being, by definition, 'ambilateral' lookers. The hypothesis received no support. The mean score on the BSRI for right movers was -l.52 and for left movers -l.08 (3341.0). Additional Findings: Staring The amount of staring (no lateral eye movement occurred) for verbal and spatial items within the three conditions was examined. The mean percentages of verbal and spatial items on which there is no eye movement is reported in Table 7. The probabilities for the significance of differences in the maineffects and interactions range from p4 .0097 for Question Type (verbal vs. spatial) to p4 .75 for Conditions x Question Type x Order, by analysis of variance. The analysis of variance appears in Table 8. Thus there is strong evidence that more staring occurs on spatial questions than on verbal questions. The Conditions by Order (C x 0) interaction for Contrast I was significant (pa<..05). Contrast I consists of EBS - (EFS + Stress)/2. To better understand this interaction, analyses of variance were done comparing each condition with one other condition in all possible pairs. These analyses of variance appear in Tables 9, 10, and 11. The C x 0 interaction was significant at p.¢:.05 only for the experimenter-behind- subject and experimenter-facing-subject conditions as Shown in Table 9. 32 TABLE 7 Mean Percentage of Verbal and Spatial Items on Which Subjects Made No Eye Movements, for the Three Conditions Order of Administration I: EBS Followed by EFS Verbal Items Spatial Items Conditions 'X SD . 2 50 E85 8.54 15.78 A 14.79 19.14 EFS 13.96 20.85 17.29 19.84 Stress 13.12 15.66 17.71 18.30 Order of Administration 11: EFS Followed by EBS EBS 11.87 12.84 15.21 18.79 EFS 8.33 9.40 10.21 10.16 Stress 12.08 15.60 11.04 14.22 EBS= experimenter—behind~subject condition. EFS= experimenter-facing-subject condition. Stress= stress condition. 33 TABLE 8 Analysis of Variance for Mean Percentage of Verbal and Spatial Items on which Subjects Made No Eye Movements, for the Three Conditions Source df MS F Order (0) 1 22.22 .54 Error 46 41.07 Conditions (C) (Contrast I) 1 .34 .05 Error 46 6.67 (Contrast II) 1 2.08 .36 Error 46 5.81 C X 0 (Contrast I) X 0 l 31.17 4.67* Error 46 6.67 (Contrast II) X 0 1 3.00 .52 Error 46 5.81 Question Type (O) 1 26.89 7.30** Error 46 3.68 O X 0 1 8.00 2.17 Error 46 3.68 C X 0 (Contrast IV) X 0 1 4.34 1.61 Error 46 2.69 (Contrast V) X 0 1 .33 .09 Error 46 3.63 C X Q X 0 (Contrast IV) X Q X 0 l .06 .02 Error 46 2.69 (Contrast V) X 0 X 0 l 2.08 .57 Error 46 3.63 * p 4:.05 ** p ¢;.01 Contrasts I= C1- (C2+C3)/2 C1- =EBS II=C C+C )/2 C2=EFS III= Verba (9)- -Spatial( S) C3=Stress IV= C1V- -C1 S- C V+C S- C V+C S v= -C1V+C1S+Cz v- 523-3 3 V+ 3s 34 This interaction is plotted in Figure 1, and shows that staring is lowest in the first condition presented to the subjects irrespective of condition. ------------------------ ----------------------------------------------- ---------------------------------------------------——---—-------------- 35 TABLE 9 Analysis of Variance for Mean Percentage of Verbal and Spatial Items on which Subjects Made No Eye Movements, for the EBS and EFS Conditions Source df Ms F Order (0) 1 38.52 .31 Error 46 121.58 Conditions (C) 1 .19 .01 Error 46 25.67 C X 0 1 130.02 5.07* Error 46 25.67 Question Type (O) 1 105.02 7.68** Error 46 13.67 Q X 0 l 9.19 .67 Error 46 13.67 C X Q 1 9.18 .81 Error 46 11.32 C X Q X 0 1 1.02 .09 Error 46 11.32 * p14..05 ** p4.01 36 TABLE 10 Analysis of Variance for Mean Percentage of Verbal and S 'atial Items on which Subjects Ma.e No Eye Movements, for EFS and Stress Conditions Source df Ms F Order (0) 1 200.08 1.76 Error 46 113.46 Conditions (C) 1 8.33 .36 Error 46 23.25 C X 0 1 12.00 .52 Error 46 23.25 Question Type (Q) 1 36.75 2.97 Error 46 12.37 Q X 0 1 24.08 1.95 Error 46 12.37 C X Q 1 1.33 .09 Error 46 14.53 C X Q X 0 l 8.33 .57 Error 46 14.53 37 TABLE 11 Analysis of Variance for Mean Percentage of Verbal and Spatial Items on which Subjects Made No Eye Movements, for EBS and Stress Conditions Source df Ms F Order (0) 1 7.52 .06 Error 46 118.53 Conditions (C) 1 6.02 .23 Error 46 26.00 C X 0 1 63.02 2.42 Error 46 26.00 Question Type (O) 1 82.69 5.15* Error 46 16.07 0 X 0 l 35.02 2.18 Error 46 16.07 C X 0 1 17.52 1.45 Error 46 12.09 C X Q X 0 1 3.52 .29 Error 46 12.09 * p44..05 Mean Percentage of Verbal Items on which Subjects Made no Eye Movements .4—4 _I 05‘ (m _.a—a_a._a-.a “NW-501 _.a 00 Ode-§U‘lm\lm 38 _. 0—4 Order I: EBS/ EFS ”' I ' Order II: EFS/EBS r h. 1.. L. i i # EBS EFS Figure 1. The Mean Percentage of Items on Which Subjects Made No Eye Movements in the EBS and EFS Conditions, for Order I: EBS Followed by EFS and Order II: EFS Followed by EBS. DISCUSSION Lateral Eye Movement as an Index of Hemispheric Activation The current results showing that spatial questions tend to elicit right looking and verbal questions tend to elicit left looking are the reverse of earlier experiments (Kinsbourne, 1972; Kocel et a1., 1972; Our, 1973; Weiten & Etaugh, 1974; Galin & Ornstein, 1974). The current, findings agree with those of Ehrlichman et‘al. (1974), who found in a series of three experiments a nonsignificant trend for Spatial questions to elicit more initial eye movements to the right than verbal questions. There is no obvious explanation for these findings, which are contrary to the current understanding of the lateral eye movement phenomenon and its relation to the activation of the cerebral hemispheres. The proposal (Bakan, 1969; Kinsbourne, 1972) that eye movement reflects activation of the contralateral cerebral hemisphere in the course of cognitive activity must be tested further. Within the confines of this theory the current results, as well as those of Ehrlichman et a1. (1974), are difficult to explain, especially since special care was taken to select Spatial and verbal items likely to require, respectively, a high and a low degree of imagery for solution. The discrepancies among the findings of the various studies sug- gest that lateral eye movement is a fragile phenomenon and that all of the significant task, subject, and environmental variables have not been 39 40 identified and brought under control. One possible source of uncon- trolled variance may be the different sets of questions used in the investigations. Most of the studies used verbal and spatial questions to elicit right and left hemisphere activation. However, both cat- egories of questions have been loosely defined. Verbal questions include word definitions, explanation of proverbs, and word analogies. Spatial items here included a variety of problems requiring the construction of a visual image in order to achieve a solution. Examples of spatial questions include: (a) "Which states border on California?" (b) "Which direction does the front of your house face?" (c) "If you hold the letter P in front of a mirror upside down, what letter would you see in the mirror?“ (d) "Describe the route by which you came to the experiment today." Both of these groups of questions are heteroge- neous and consist of problems which may tap different cognitive processes. The use of a standardized set of problems in various experiments would introduce a higher degree of control into this research. These problems can often be solved by either a verbal or a spatial approach. For example, when a subject is asked "Describe the route by which you came to the experiment today," he may indeed visual- ize the route or if he is highly familiar with the route he may not need to call upon imagistic cues to answer the question. The degree to which individuals use a verbal or spatial approach to solve problems probably is related to individual abilities and propensities. In future studies it would be valuable to perform an item analysis examining the responses of the subjects to individual problems. Such an item analysis could examine the difficulty of the problem, the percentage 41 of right and left looking, the content of the item, and the relation- ships among these variables. It also would be worthwhile to relate these item variables to individual differences such as verbal and spatial ability. A new method of measuring lateral eye movements was employed and consisted of measuring the duration of all eye movements from presenta- tion of the question to subject response. It was assumed that the solution of problems extends over a duration and that the eye movements during this period are an index of continuous hemispheric activation in the service of problem solution. Thus the measurement of the dura- tion of total eye movements may be a more valid reflection of hemi- spheric activation than the first eye movement as was used by Gur (1973). While the rating of first eye movements indicated a trend for Spatial questions to elicit eye movements to the right with a greater frequency than verbal questions, this trend was significant only when the dura— tion of total eye movement was employed as the measure. It would be appropriate for future research to use both measures of eye movements and to further clarify the relationship between the two. Eye Movement, Experimenter Location,_and Anxiety The results of this study did not confirm Gur's (1973) finding that experimenter location affects lateral eye movement, such that in the experimenter-facing-subject situation subjects tend to look predomi- nantly in one direction while eye movements in the experimenter-behind- subject condition are to the left or the right depending upon question type. The current findings suggest that the directional consistency 42 of eye movements is unrelated to experimenter location. This failure to confirm Gur's (1973) results is difficult to explain, Since the experi- mental procedures were very similar in both experiments. Since anxiety was not related to the directional consistency of eye movement in this study, it may be that other variables contributed to the differences that Our (1973) found between the experimenter-facing-subject and experi- menter-behind-subject conditions. Our (1973) suggested that the effect of experimenter location upon eye movement is mediated by anxiety. She concluded that the anxiety aroused by the interpersonal situation in the experimenter-facing- subject paradigm distracts the subject from the salient aspects of the problem, making him fall back on a mode of cognitive processing (and by implication of a hemispheric) characteristic of that subject. The results of the current study indicate that anxiety is not related to eye movement behavior, since no differences were found between the stress condition and the experimenter-behind-subject condition. Indeed, there; were no differences among any of the three conditions. Thus the direc-gf tional consistency of eye movements does not appear to be related to ‘ anxiety as Our (1973) suggested. The hypothesis that anxiety is related to experimenter location was not supported. Subjects reported an equivalent degree of anxiety in the experimenter-behind-subject and experimenter-facing-subject situations. A high degree of anxiety, however, was observed by experi- menters and reported by many of the subjects during the debriefing (see 43 Appendix E). This already high level of anxiety may have prohibited a further increment of anxiety by such a subtle manipulation as the experi- menter-facing-subject Situation. It is possible that at this already elevated level of anxiety, a more potent threat to self-esteem, such as the stress condition, may have been necessary to arouse further anxiety. It may be important that both the experimenters and subjects in the current study were male, whereas Gur's (1973) male subjects were tested by women. Whether men would experience significantly more anxiety I , /‘ in an experimenter-facing-subject situation with a woman is uncertain. Sarason and Winkel (1966) found that male subjects rated male experi- menters as more friendly, relaxed, and casual than female experimenters in the course of administering tasks. This more favorable view of male experimenters by male subjects could result in a lower anxiety level, and less of a threat to self-esteem. Men's self-esteem may be more vulnerable when confronted by a female experimenter, in circumstances where intellectual competence is apparently being examined. This could have made the experimenter-facing-subject situation more anxiety-arousing in Gur's (1973) study. Ego Strength and Hemispheric Activation The hypothesis that the capacity to use the appropriate hemisphere in problem solving is associated with ego strength received very weak support. A marginally significant low correlation between these factors was found in the stress condition although not in the other two conditions. Since ego strength can be thought of as an individual's capacity to main— tain adaptive means of coping in the face of stress, perhaps it might be 44 expected that this trait influences behavior, or discriminates among individuals' behavior in stressful Situations only. A different measure of ego strength may be needed to adequately examine the current hypothesis, which may be referring to only one com- ponent of the trait as measured by the Barron Scale (1953). Factor analysis of the Ego Strength Scale (Stein & Chu, 1967) reveals the fol- .1owing factors: freedom from disabling anxiety or depression, freedom from disabling primary process thought, freedom from physical complaints, a religious attitude of nonbelief, seeking heterosexual stimulation. These factors may not be closely enough related to the capacity for efficient problem solving and use of the appropriate cerebral hemisphere. Furthermore, the Ego Strength Scale (Barron, 1953) has proven to be most effective in discriminating normal and psychiatric groups and also in differentiating among psychiatric groups (Frank, 1967). The instrument may lack sufficient sensitivity to discriminate within a normal pOpula- tion where the range of ego strength by definition is relatively narrow. Nevertheless, the current findings do suggest that further examination of the relationship between ego strength and the lateral eye movement phenomenon is warranted. Lateral Eye Movement and Identity The hypothesis that left movers describe themselves in relatively more feminine sex stereotyped terms was not confirmed. There are several possible explanations. This hypothesis presupposes a relation- ship between lateral eye movements and hemispheric activation which the current findings call into question. Secondly, from another perspective 45 the functional capacities of the cerebral hemispheres and of individuals characterized as left movers and right movers may not fit the dichoto- mous categorization of masculine and feminine as was believed at the outset of the study. Although the functions attributed to each cerebral hemisphere as well as the personality characteristics of unidirectional left and right movers appear to correspond to broad sex role stereo- types, there are major exceptions. For example, it has been shown repeatedly that males demonstrate superior ability in Spatial tasks, a function of the right hemisphere which in this study was thought of as mediating functions stereotyped as feminine. Secondly, the superiority of females in certain limited aspects of verbal ability, a predominantly left hemisphere function, has also been demonstrated (Harris, in press). Thus the current finding suggests that there is no relationship between sex role identification and the use of a preferred cerebral henisphere as measured by the preferred direction of lateral eye movement. Additional Findings: Starim The greater incidence of staring on spatial questions confirmed similar findings by Kinsbourne (1972), Galin and Ornstein (1974), and Ehrlichnan et a1. (1974). In all these studies, staring was interpreted as a manifestation of simultaneous and equal activation of both hemi- spheres. It is reasonable that staring most often occured on spatial problems. Since these problems were verbally presented, left hemi» sphere activation would have been necessary to process the verbal com- munications, and right hemiSphere functioning was necessary for their solution. 46 Another explanation of the higher frequency of stares on spatial items is possible. Meskin and Singer (1974) proposed, in their cogni- tive processing model of lateral eye movement, that concentration upon imagined visual images may require reduction of external stimulation in the visual system. Continuous staring at a fixed point may provide the most redundant and least compelling external visual field. Thus during spatial problem solving, staring may reduce the interference from the external field with the internally generated image. A test of the two competing models, bilateral hemispheric activation and cognitive processing, could be made by presenting spatial and verbal problems to subjects with their eyes closed. Eye movements could be measured electrophysiologically. The lack of external visual stimula- tion would preclude the influence of peripheral factors upon eye move- ment behavior. The results of the current study Showed that staring occurred least frequently in the first condition administered, whether it was the EBS or EFS condition. This suggests that staring is related to a time dependent variable involving accommodation to the experimental Situation. It does not appear to be activation, since no differences were found in the anxiety scores. Future research should examine this effect in order to clarify the significance and function of staring. ConClusion and Suggestions for Future Research The current results raise further questions about the lateral eye movement phenomenon. In agreenent with previous empirical investiga- tions and neuropsychological theory, it was found that spatial problems 47 elicit more staring than verbal items. Secondly, support, though weak, was found for the hypothesis that ego strength is associated with the use of the appropriate hemisphere in solving problems as indicated by the direction of lateral eye movenents.t It was unexpectedly found, however, that verbal problems pre- dominantly elicited eye movements to the left and spatial problems predominantly elicited eye movements to the right. While these results confirm an earlier report of a nonsignificant trend for spatial prob- lems to elicit eye movements to the right (Ehrlichman et a1., 1974), they do not agree with most other earlier reports or with the theory associating the direction of lateral eye movement with hemispheric activation. These discrepancies are difficult to explain. It is possible that the lateral eye movement phenomenon may be influenced by variables which have not been identified and controlled. It would be helpful if a series of experiments employed the same set of problems and if the sex of the experimenter is held constant. Sex and handedness of subjects should be controlled. Furthermore, unlike all other studies, neither the current study nor Gur's (1973) study separated verbal and spatial items into homo- geneous blocks for consecutive presentation of one type of problems; all of the other studies did follow this procedure. Though the effect of blocking items has not been enpirically examined, it may be that blocking enables the subject to develop a cognitive set toward the problems. This set could encourage the subjects to use the appropriate cognitive approach and the appropriate hemisphere. Also, the 48 introduction of each block of problems, wherein the subjects are primed as to the nature of the problems which follow and the most suitable cognitive approach for their solution can also be employed. Kinsbourne's (1973) attentional model for laterality effects in cognition has bear- ing on this point. Kinsbourne suggests that a preparatory state in a cerebral hemisphere makes that hemisphere more ready to employ the mode of cognitive processing characteristic of that hemisphere. A preparatory state could be induced by blocking and priming according to Kinsbourne's model. The resulting attentional orientation could enhance the readiness of the cerebral hemisphere to become activated by the appropriate material and could enhance the readiness to stimulate eye movements in the contralateral direction. Kimura's (1967) model for laterality effects in cognition does not take into account attention and hemispheric readiness so that a prediction concerning blocking and . priming could not be made on the basis of her model. It is suspected that both the use of blocking and priming Should emphasize the salient characteristics of the problems and heighten the lateral eye movement effect as reported by Kinsbourne (1972), Our (1973), and others. The use of electrophysiological measures of eye movement, permit- ting the subject's eyes to remain closed, would also introduce a methodological improvement in this research. The measurement of eye movements with the eyes closed would prohibit the influence of external visual stimuli upon eye movement and control all variables on the visual periphery. 49 The current results indicate that experimenter location and anxiety do not influence lateral eye movement in any detectable way. Perhaps a more rigorous and simpler investigation of the influence of anxiety upon lateral eye movement can be performed. One possi- bility is the use of two independent groups who are both asked to solve problems, with eyes closed, in the experimenter-behind-subject Situation. 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Left hemisphere specialization for language in the newborn: Neuroanatomical evidence of asymmetry. Brain, 1973, 22, 641-646. APPENDICES APPENDIX A —-J C 11. 12. (71th APPENDIX A Test Forms Form I Name a word beginning with "C" meaning to utter loudly or clearly. 0n the typewriter, where is the letter "R" relative to "B"? Which states border the Great Lakes? Name a word beginning with "I" meaning “to copy or emulate." Name a word, beginning with "F" meaning "new to one's experience, novel, original." On the map of the United States, which is farther south, San Francisco or Atlanta? Imagine a telephone. On which Side is the cord to the receiVer? Complete the analogy. Sporadic:Constant :: Infrequent: Complete the analogy. Enraged:Annoyed :: Ecstatic: You leave Jacobson's Department store on Grand River and walk toward the Student Book Store. Name one store that you will pass on the way. Imagine a car from the passenger side, moving forward. In what direction do the wheels turn? Complete the analogy. Ziszetter :: Area: 58 13. 14. 15. 16. 17. 18. 19. 20. 59 Complete the analogy. Shirt:Wear :: Bloody Mary: Imagine a circle rotating around its diameter. What Shape do you get? Which states border on Ohio? Name a word beginning with "H" meaning "to desire with some con- fidence of fulfillment." Imagine the capital letter "P" upside down and held before a mirror. What letter do you get? Name a synonym for exaggeration. Name a synonym for perseverance. You are sitting in front of a telephone. Where is the metal part which stops the finger, relative to the telephone number? 10. 11. 12. 60 Form II Complete the analogy. Infection:Epidemic :: One: On the map of the United States, where is Chicago relative to Minneapolis? Name a synonym for cause. You are traveling from Denver to Minneapolis. Which states do you pass through? Name the word beginning with "E" meaning "the applied use of physical or mental energy." Imagine Lincoln on a penny. In which direction does he face? Complete the analogy. NeverzAlways :: Zero: Imagine a square. In your imagination, draw a line from the upper left corner to the lower right corner. Now draw line from the upper right corner to the lower left corner. What Shape does this produce? Name the word beginning with "E" meaning "something brought about by a cause or agent." Imagine the campus as a clock where the Men's IM is the center and the Administration Building is 12 o'clock. In what hour approximately will the Union Building be? Name a synonym for impatience. You are standing in front of an ice cream vending machine. On which Side is the money slot? 13. 14. 15. 16. 17. 18. 19. 20. 61 On the cartoon page of the State News, where does "Peanuts" appear relative to Doonesbury"? Name a synonym for instantaneous. Imagine the pedals of an automobile. Where is the brake in rela- tion to the accelerator? Name a synonym for infiltrate. Imagine the lion's head in the MGM movies. To which Side is it tilted after it stops moving? Name a word beginning with "G" meaning "to predict with insuf- ficient information." Complete the analogy. Time:Space :: Schedule: If you look at the lower case letter "b" in the mirror, what letter do you see? 10. 11. 12. 13. 14. 15. 16. 62 Form III Complete the analogy. Number:Gender :: Singular: Imagine the campus as a clock where the library building is the center and Beaumont Tower is 12 o'clock. In what hour approximate- ly will the Administration Building be? Name a synonym for impulsive. Imagine Thomas Jefferson on a nickel. Which direction does he face? Name a word beginning with "N" meaning to "confer with another or others in order to come to tenns. If the Administration building were tipped over onto its west side, in which direction would the bottom of the building face? Complete the analogy. Barrier:Impede :: Elevator: Which is farther east, Cincinnati or Toledo? If you hold the number "9" up to a mirror, and turned it upside down what letter does this resemble? Name a word beginning with "L" meaning "deficiency or absence.“ Complete the analogy. DayzYear :: Second: On the back of a nickel, where does the phrase "E Pluribus Unum" appear? Complete the analogy. I:You :: Shall: Visualize your social security card. Where is your number on it relative to your name? Name a synonym for middle. On your M.S.U. I.D. card, where is your signature relative to your photograph? 63 17. Name a synonym for regularity. 18. If you are facing the driver's side of a car, on which side are the hinges of the driver's door? 19. Imagine a square rotating 360 degrees around its axis. What shape would you get? 20. Name a synonym for general. 11. 12. 13. 64 Form IV Name a word that begins with "G" that means to "talk of rumors and sensational facts." You are sitting before a typewriter. Where is the letter "O" in relation'to "0"? Recall the portrait of Whistler's Mother." To which Side of the viewer does she face? Name a word beginning with "1" meaning "power to sway a person or course of events." Name a synonym for similarity. You are traveling from South Dakota to Oklahoma. Which states do you pass through? Name a word beginning with "0" meaning, "someone who always expects the best possible outcome." You are traVeling from Las Vegas to Dallas. Which states do you pass through? Complete the analogy. Dislike:Hate :: Respect: Imagine your driver's license. Where is the date of expiration on it relative to your picture? Name a synonym for extraneous. Imagine the campus as a clock where the stadium is the center and the Administration Building is the hour 12. On what hour approximately is the auditorium? Which states border on Lake Superior? 14. 15. 16. 17. 18. 19. 20. 65 Name a synonym for dimension. Imagine two parallel lines. Upon these superimpose two vertical parallel lines, the same distance apart. What Shape do you get? Name a word beginning with "B," meaning "to carry, to support." Name a synonym for destruction. In what direction does George Washington face on a dollar bill? Recall the photograph of the U.S. Marines raising the flag at Iwo Jima. In which direction is the flag pole pointing? Name a synonym for assemblage. 11. 12. 14. 66 Form V Name a synonym for redeem. Imagine the Miss Liberty Statue in the Columbia movies. In which direction does it face? You are sitting in front of a typewriter. Where is the letter "J" in relation to "C"? Name a word beginning with "S" meaning "to prick painfully? Imagine two right triangles of equal size. If you join then along their longest side, what figure do you have? Name a word beginning with “G" meaning "to control, guide, direct.“ Name a word beginning with "C" that means "to begin." Imagine walking toward the setting sun. What happens to your Shadow as time passes? Name a word beginning with "A" that means "wide awake and watchful.” Imagine turning a bulb into a socket. In which direction must you turn it? Imagine the campus as a clock where the Administration Building is the center and the Union Building is the hour 12. On what hour approximately is the Student Services Building? Complete the analogy. MongrelzPurebred :: Alloy: On the front page of the State News, where is the Sketch of Beaumont Tower relative to the State News masthead? 15. 16. ' 17. 18. 19. 67 Man a word beginning with “0" meaning "a view or judgment about a particular manor." 1 N You are on the corner of Abbott and Grand River and you "start walking tourd M.A,c. llama ona stora you will pass on your way. On. the map of the Unitad Statas, which states border on California? Diana a swan: for changa. Nana a synonym for increase. (in Your ii. 5. 0. Library card whara is the green stripe in rela- tion to your student labor? d . #WN 11. 12. 13. 14. 15. 68 Form VI On a pay telephone, where iS the Slot for the dime? Name a synonym for exclusion. Complete the analogy. Person:Reincarnation :: Battery: You are driving a car and approaching an intersection with a traffic light. Where is the red light relative to the green light? Name a word beginning with "R" meaning "to keep in mind." On the station dial of a radio, where do the stations with the higher frequency numbers appear? Name a word beginning with "0" meaning "to decide, establish, or ascertain conclusively." You are Sitting in front of a typewriter. Where is the letter "L" in relation to "K"? Name a synonym for absolve. Imagine a long rectangular block whose width and height are equal and whose length is twice its width. If you cut the block into two equal lengths what figures do you have? Complete the analogy. Silent:Taciturn :: Mute: Is Mexico City east or west of St. Louis? Name a synonym for abstract. When you wish to back up in a car, and go to your left, which way do you turn the steering wheel? You are standing in front of a coffee vending machine. On which side is the money Slot? 16. 17. 18. 19. 20. 69 Name a word beginning with "S" that means "to strike with amazement because unexpected." Name the word beginning with "C" meaning "quiet or serene." You are coming out of the Campus Theater on Grand River. You turn left. Name two stores you will pass. Name a word beginning with "1" meaning "not suited to the given circumstances." ' What states border on Texas? APPENDIX B APPENDIX B Questionnaire on Hand Preference First, state whether you regard yourself as right-handed (R), left- handed (L), or ambidextrous (A) GENERAL INSTRUCTIONS: The main body of the questionnaire falls into two parts: PART A is designed to find out which hand you habitually use, or would prefer to use, for certain acts requiring the use of one hand only. It is expected that habitual tendency and preference will, for the most part, coincide, but if there is any case where they differ, you are asked to add a note to that effect. PART B is designed to find out which hand plays the leading role in certain acts requiring the use of both hands. Indicate in the column provided, R, if you use your right hand, L, if you use your left hand, or E, if you are aware of no Special preference in either direction, i.e., if you are just as likely to use one hand as the other. When in doubt, you should try to settle the issue by experimenting, for example, by going through the motions or by trying to visualize your- self performing the action. 70 #WN 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. With which hand do you With which hand do you write? With which hand do you With which hand do you minton, and paddle ball? With which hand do you paper)? 71 throw? draw? play games such as tennis, squash, and bad- use a pair of scissors (e.g., for cutting With which hand do you With which hand do you your hair) use a razor? (state type of razor) use a comb? (state side on which you part With which hand do you With which hand do you (e.g. , cutting string, With which hand do you With which hand do you With which hand do you With which hand do you with a fork? use a toothbrush? use a knife for purposes other than eating? sharpening a pencil) use a spoon for eating? use a hammer? use a screw-driver? use a knife for cutting, in conjunction On which side of your body do you swing a baseball bat? On which hand do you hold the top of a broom when sweeping? With which hand do you With which hand do you With which hand do you strike a match? unscrew the lid of a jar? hold the top of a rake when raking?_________ With which hand do you deal cards? 72 20. With which hand do you guide the thread through the eye of a needle, or the needle onto the thread, as the case may be? APPENDIX C APPENDIX C Barron Ego Strength Scale INSTRUCTIONS: Read each statement and decide whether it is true as applied to you or false as applied to you. You are to mark your answers on the computer answer sheet. If your response to the statement is IBQE_blacken the space for alternative 1_for the appropriate item on the answer sheet. If your response to the statement is FALSE or NOT USUALLY TRUE blacken the space for alternative 2 for the appropriate item on the answer sheet. Remember to give YOUR OWN Opinion of yourself. Do not leave a ny items unanswered . Remember: TRUE -1 FALSE - 2 .J O I believe my sins are unpardonable. Christ performed miracles such as changing water into wine. Often I cross the street in order not to meet someone I see. At times I have fits of laughing and crying that I cannot control. I brood a great deal. 0501-wa I am attracted by members of the opposite sex. 7. One or more members of my family is very nervous. 73 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 74 I am afraid of finding myself in a closet or small closed place. I like to cook. My plans have frequently seemed so full of difficulties that I have had to give themup. I have often been frightened in the middle of the night. I feel sympathetic towards people who tend to hang on to their griefS and troubles. I am not afraid of fire. I have had no difficulty in keeping my balance in walking. I feel unable to tell anyone all about myself. I have never had a fainting spell. I pray several times every week. I have had blank spells in which my activities were interrupted and I did not know what was going on around me. I frequently find myself worrying about something. I do not like to see women smoke. I find it hard to keep my mind on a task or job. I have a cough most of the time. I like science. My hands have not become clumsy or awkward. I have had some very unusual religious experiences. I would certainly enjoy beating a crook at his own game. I feel tired a good deal of the time. When I am with people, I am bothered by hearing very queer things. Everything is turning out just like the prophets of the Bible said it would. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 75 When I get bored, I like to stir up some excitenent. I feel weak all over much of the time. I have a good appetite. I am in just as good physical health as most of my friends. I like to talk about sex. I dream frequently about things that are best kept to myself. I have diarrhea once a month or more. I have met problems so full of possibilities that I have been unable to make up my mind about them. I have strange and peculiar thoughts. Parts of my body often have feelings like burning, tingling, crawling, or like "going to sleep.“ I am made nervous by certain animals. I like to flirt. My skin seeps to be unusually sensitive to touch. I do many things which I regret afterwards (I regret things more or more often than others seem to). At times I hear so well it bothers me. The man who had most to do with me when I was a child (such as my father, stepfather, etc.) was very strict with me. I sometimes feel that I am about to go to pieces. I never attend a sexy show if I can avoid it. I like collecting flowers or growing house plants. My way of doing things is apt to be misunderstood by others. I very much like horseback riding. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 76 If I were an artist, I would like to draw flowers. During the past few years I have been well most of the time. Dirt frightens or disgusts me. I seldom worry about my health. I have had very peculiar and strange experiences. Sometimes some unimportant thought will run through my mind and bother me for days. I can be friendly with people who do things which I consider wrong. I get mad easily and then get over it soon. When I leave home, I do not worry about whether the door is locked and the windows closed. I am easily downed in an argument. I think Lincoln was greater than Washington. When someone says silly or ignorant things about something I know, I try to set him right. APPENDIX D Ben Sex Role Inventory APPENDIX D Please indicate on a 7-point scale how well each of the character- istics describes you. beside each item number. Write the number appropriate for your answer 5 . 6 7 . 1 2 . 3 "NEVer or almost never true of me _____1 Self-reliant _____2 Yielding __~__23 Helpful _____4 Defends own beliefs ______5 Cheerful _____6 Moody _____7 Independent _____8 Shy ______9 Conscientious _____JO. Athletic _____11. Affectionate ______12. Theatrical _____13. Assertive _____14. Flatterable 15. Happy ________16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 77 Always or al- most always true of me Strong personality Loyal Unpredictable Forceful Feninine Reliable Analytical Sympathetic Jealous Has leadership abilities Sensitive to others' needs Truthful Willing to take risks Understanding Secretive 78 . Makes decisions easily _____46. Aggressive . Compassionate _____47. Gullible . Sincere _____48. Inefficient . Self-sufficient _____49. Acts as a leader . Eager to soothe feelings _____50. Childlike . Conceited _____5l. Adaptable . Dominant _____52. Individualistic . Soft spoken _____53. Not use harsh language . Likeable _____54. Unsystematic . Masculine _____55. Competitive . Warm _____56. Loves children . Solemn ___57. Tactful . Willing to take a stand _____58. Ambitious . Tender 59. Gentle . Friendly 60. Conventional APPENDIX E APPENDIX E The Debriefing The debriefing provided an informal manner of investigating the impact of the experiment upon the experience of the subjects. The primary aim of debriefing was the clarification of the intent of the experiment, especially with respect to the induction of stress. Secondly, the exploration of the subject's feelings helped alleviate anxiety and a potential sense of failure engendered by the stress condition. Thirdly, the discussion of the subject's experience served to monitor and evaluate the effectiveness of the experimental manipula- tions and the presence of confounding variables. The subjects experienced a range of reactions to the stress condition. One subject reported extreme anger, "I felt like tearing the place apart." The intensity of his reaction warranted continuing the debriefing for an extra hour later in the day. The subject returned and initially expressed his anger at the experimenter for having received negative feedback. He began to talk of the frustration he had been experiencing with his academic work and how this frustration had been aggravated by his experience in the experiment. His anger subsided significantly and he appreciated this opportunity to explore his frus- trations. He left the debriefing session feeling that his experience 79 80 had been a positive and useful one in learning about himself. One other subject experienced intense distress warranting an extended debriefing. This subject reported feeling quite anxious, disappointed, and angry with himself over what he still considered to be his inadequate performance. Since this subject appeared to be directing his anger toward himself, he was helped to express his anger toward the examiner. After having directed his anger toward the experimenter the subject left the debriefing feeling considerably relieved. Most of the subjects reported feeling more anxious in the stress condition, and this was a result of their reported attempts to con- centrate harder on the problems in this condition. Additionally, some subjects attributed their higher anxiety to the apparently higher status and authority of the experimenter in the stress condition. Three subjects reported that they believed that the experimenter's comments were designed to raise their anxiety and that they were not affected by it. Two of these subjects, however, reported, on the anxiety inventory, experiencing greater anxiety in the stress condition than in the other two conditions on the anxiety inventory. It is not pos- sible to determine whether this discrepancy between verbally reported anxiety and scores on the anxiety inventory is attributable to the demand characteristics of the experiment. It is possible that these subjects reported higher anxiety on the inventory because of a desire to support the hypothesis of the experiment as they perceived them. An alternative possibility suggests that at least some of these subjects 81 attenpted to minimize the impact of the experimenter's comments in the stress condition by denying the significance of these comments. In line with this explanation one subject commented paradoxically, "I wanted to leave...but I didn't take it seriously." Two subjects spontaneously reported feeling tense throughout the experiment as a result of the constraint imposed upon them by the foam rubber head guides. It is impossible to assess the effect these head guides had on the entire subject sample, but these head guides may have raised the anxiety of other subjects who did not choose to Spontaneously report it. The debriefing session was apparently experienced as being helpful by providing an opportunity to ventilate anxiety aroused by the experiment. Secondly, this discussion of their experience and the purpose of the experiment seemed to enrich the personal and educational rewards of their participation. TICHIGAN STATE UNIV. LIBRARIES 1111111111lllliliilllilllll11111111111111.4111ill 31293105372266