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Ames Trapezoid Illusion: A New Model, Daniel Robert Kelly

Dissertations and Theses

Current explanations for the Ames Trapezoid Illusion are based upon the the absence of cues: the illusion is said to occur at chance. A review of recent literature showed that: (a) the illusion varies in frequency as a function of target shape (b) that the dominant cue to reduce the frequency of the illusion is the variant in retinal height. Based upon the dominance of this cue a new model was presented. Following this model it was hypothesized that observers viewing partial rotation when the target produces the greatest difference in the retinal height of the ends would determine the …

The Effectiveness Of Environmental Control In Modifying Problem Behaviors In Mother-Child Interaction, Thomas Whalen Hamilton

Dissertations and Theses

An experiment was designed to test the effectiveness of using standard laboratory environments in producing a broad class of problem behaviors which defined Mother-Child (M-C) interaction difficulties. The effects of four environments, free-time (X), child's game and rules (B), mother's game and rules (C), and clean-up (Z), on the frequency of eight criteria behaviors were tested on 12 M-C pairs over three days of baseline data collection. It was predicted that the frequency of problem behaviors would decrease as a function of environment (X) and increase as a function of environments (B), (C), and (Z). A two factor …

Behavioral Changes Due To Overpopulation In Mice, James Robert Hammock

Dissertations and Theses

Previous research has found that if a population were allowed to exceed a comfortable density level, then many catastrophic events occurred such as increased mortality among the young, cannibalism, homosexuality, and lack of maternal functions. The most influential researcher in this area is Calhoun (1962), after whose experimental design a pilot study was fashioned to replicate his results. The results of this pilot study inspired a more detailed research project of which this thesis is an account.

Forty-eight albino mice of the Swiss Webster strain were divided into three groups of sixteen each. Each group consisted of ten females and …

The Effects Of Marihuana Extract Distillate On Eating Behavior Of Rats, Terrie Wetle

Dissertations and Theses

Since hunger drive is often used as a motivating factor in animal learning experimentation, it was decided to determine the effects of marihuana extract distillate on the eating behavior of rats. Carlini and Kramer (1965) found marihuana extract injections to have a faciliatory effect upon maze performance. They suggested that facilitation could have resulted from and increase in hunger drive. However, if the dosage level is high, this effect may last for a short time and be followed by a disinterest in food. Scheckel et al. (1968) report that some monkeys, at very high dosage levels of tetrahydrocannabinol starved to …

The Effect Of Labeling Disfluencies As 'Stuttering' And Contingent And Yoked "Wrong" On The Disfluencies Of Normal Speakers, Dennis Ray Staines

Dissertations and Theses

A labeling variable suggested by Wendell Johnson's "diagnosogenic" theory of the onset of stuttering was included in this study of the disfluencies of normal speaking college students in order to explore further the hypothetical relationship between normal disfluency and the onset of stuttering. A total of 60 Ss were randomly assigned to the following groups, each containing 10 Ss: I. Labeling Chastisement plus Contingent "wrong;" II. Labeling Chastisement plus Yoked (non-contingent) "wrong;" III. Labeling Chastisement - No "wrong;" IV. No Labeling Chastisement Contingent "wrong;" V. No Labeling Chastisement - Yoked "wrong;" VI. No Labeling Chastisement - No "wrong" …

An Attempt To Find Predictor Variables Which Will Discriminate Between Those Patients Who Seek Aftercare Treatment And Those Who Do Not Seek Aftercare Treatment Upon Discharge From A Psychiatric Ward, Nena V. Johnstone, William D. Lynch, Philip M. Baldwin, John C. Kemp

Dissertations and Theses

This is an exploratory follow-up study of the clientele of the Psychiatric Crisis Unit, a short-term, crisis-oriented inpatient psychiatric ward. The main objective of the research was to test the following null hypothesis: there are no significant differences between those individuals who attempt to gain aftercare treatment as opposed to those individuals who do not following discharge from the Crisis Unit.

A sample of fifty-one voluntary patients who consented to participate in the study was used in testing this hypothesis. Each subject completed the Minnesota Multiphasic Personality Inventory (M.M.P.I.) and a sociological questionnaire while in the Crisis Unit, and a …

Anxiety Level Of Graduate Students In Social Work, Sophia Kouidou-Giles, George Albert Mckee

Dissertations and Theses

This study was designed to determine (1) the trend of anxiety level of social work students, term by term, over the academic year; (2) the cyclical trend of anxiety level of social work students within each term and (3) the effects of age and sex on level of anxiety among social work students.

Anxiety was measured with the IPAT - 8 Parallel Form Anxiety Battery. This test was administered to twenty randomly selected first year students in the School of Social Work during the 1969-1970 academic year at Portland State University. Data was collected from six test administrations which …

Continuance Vs. Discontinuance In Family Counseling, Katherine Anderson, Alice Dudley, Mayetta Rocks

Dissertations and Theses

The study was designed to examine the social workers' and clients' perceptions of change in the treatment process; specifically to examine the question of why clients discontinue service prior to planful termination. Also, the authors attempted to assess the client's perception of gain and the worker's assessment of gain.

An Interactional Approach To Weight Reduction, Carole T. Gygi

Dissertations and Theses

A treatment program was designed to enable subjects to lose weight through the use of self-confrontation as described in Saslow (1969), and the use of the General Relationship Improvement of the Human Development Institute (HDI), Berlin and Wyckoff (1964). Self-confrontation is a programmed rehearsal of a specific problem by one person alone, for a five-minute period. The rehearsal, or self-confrontation is to be as vivid as possible, intellectually, emotionally, visually and physically. The General Relationship Improvement Program is a 10-week text, worked in pairs, which is aimed at better intrapsychic and interpersonal communication and understanding. Four matched groups were used …

Post-Divorce Visitation Of Minor Children; Development Of A Questionnaire, Viola Cotter, Lorraine Goldenberg, Terry Mcgill

Dissertations and Theses

The present descriptive study was broadly concerned about divorces which have an impact on minor children. It was intended to build on the previous research of Griffith, Hack, Murphy, Wieman, Williams, Van Lydegraf & Glaudin (1970) in describing the relationships between parents and children after divorce. It was the objective of the present research team to come closer to the goal of selecting a representative sample of divorced parents than was possible previously. Moreover, an attempt was made to develop a highly structured questionnaire and interview schedule growing out of the earlier experience with semi-structured interviews. Data to be collected …

Schedule Interactions And Stimulus Control, Andrew Louis Homer

Dissertations and Theses

Four types of schedule interactions have been defined: positive contrast, negative contrast, positive induction, and negative induction. Most work has centered on the necessary conditions for positive contrast. One position states that a reduction in reinforcement frequency is necessary; the other view states that a reduction in response rate is necessary. Neither view can account for the occurrence of induction. The present experiment tests the hypothesis that stimulus control effects the occurrence of either contrast or induction. Three pigeons were trained to respond for primary reinforcement (strong stimulus control condition), and three pigeons were trained to respond for conditioned reinforcement …

Action-Oriented Group Therapy For Lower-Socio-Economic-Status Clients, Joan C. Peters

Dissertations and Theses

An attempt is made to present a model of group therapy for Lower-Socio-Economic-Status (LSES) clients. The theoretical issues include a definition of traditional group therapy along with a brief description of the more recent sensitivity training approaches. A rationale for combining these two different group approaches is presented to form the model for action-oriented group therapy (ACT groups) which utilizes both the traditional approach and action techniques of the sensitivity group. It is proposed that this hybrid, the AOT group, is more appropriate for treating the LSES client. The needs and expectations of the LSES client are discussed. The goals …