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Full-Text Articles in Psychology
Session Duration And The Vi Response Function: With-In Session Prospective And Retrospective Efffects, James Dougan, Alfred Kuh, K. Vink
Session Duration And The Vi Response Function: With-In Session Prospective And Retrospective Efffects, James Dougan, Alfred Kuh, K. Vink
Scholarship
Two experiments examined the effects of session duration on responding during simple variable-interval schedules. In Experiment 1, rats were exposed to a series of simple variable-interval schedules differing in both session duration (10 min or 30 min) and scheduled reinforcement rate (7.5 s,15 s, 30 s, and 480 s). The functions relating response rate to reinforcement rate were predominantly monotonic for the short (10-min) sessions but were predominantly bitonic for the long (30-min) sessions, when data from the entire session were considered. Examination of responding within sessions suggested that differences in the whole-session data were produced by a combination of …
The Degree Of Eating Disorder Pathology And Its Relation To Depression And Self-Esteem In A Nonclinical College Student Population, Derik M. Thieme '93
The Degree Of Eating Disorder Pathology And Its Relation To Depression And Self-Esteem In A Nonclinical College Student Population, Derik M. Thieme '93
Honors Projects
Research on eating disorders has mainly focused on clinical populations and adolescents. In this study, a nonclinical sample comprised of female college students was studied. The relationship between eating disorder symptomatology and the variables of depression and self-esteem were examined using the following measures: (1) The Eating Disorders Inventory-2; (2) The Beck Depression Inventory; and (3) The Multidimensional Self-Esteem Inventory. A total of fifty-six subjects were studied. It was hypothesized that those subjects who scored higher overall on the EDI-2 would exhibit higher levels of depression and lower levels of self-esteem than those who scored lower overall on the EDI-2. …
Assessment Profiles Of Children And Adults Identified As Learning Disabled, Malanie Mcdiarmid '93
Assessment Profiles Of Children And Adults Identified As Learning Disabled, Malanie Mcdiarmid '93
Honors Projects
This study examined four major assessment profiles associated with learning disabled (LD) students and adults: the discrepancy between Verbal and Performance Intelligence Quotient (lQ), with Performance greater than Verbal, the Bannatyne pattern, and the ACID profile, and a profile suggested by Ozols and Rourke (1988). The validity of these profiles was examined by using more reliable diagnostic criteria to avoid the methodological flaws present in other LD profile studies. Subjects were 120 children and adults defined as having an Academic Skills Disorder according to the Diagnostic and Statistical Manual for Mental Disorders-Revised (American Psychiatric ;Association, 1987) criteria. The subjects' performances …
State-Dependent Learning During Alprazolam Assisted Exposure: A Pilot Study Of Social Phobia, Patrick B. Mcgrath '93
State-Dependent Learning During Alprazolam Assisted Exposure: A Pilot Study Of Social Phobia, Patrick B. Mcgrath '93
Honors Projects
Social phobia is a newly defined disorder, and treatments for it typically involve pharmacotherapy or some form of in vivo exposure. When combining these therapies, there are three possible outcomes: No effect, an additive effect, or an interference effect. If additive, the pharmacotherapy will enhance the extinction of fear, and it will not increase the chance of relapse after drug discontinuation. If there is an interference effect, the pharmacotherapy will block extinction to the phobic situation, and there will be a relapse of anxiety when placed in the phobic situation in the no drug state. If this is the result, …
An Animal Model Of Alzheimer's Disease: Behavioral And Histological Assessment Following Bilateral Intrahippocampal Injections Of B-Amyloid (25-35), David E. Kang '93
An Animal Model Of Alzheimer's Disease: Behavioral And Histological Assessment Following Bilateral Intrahippocampal Injections Of B-Amyloid (25-35), David E. Kang '93
Honors Projects
Pathologically, Alzheimer's disease (AD) is characterized by deposits of neuritic plaques (NP) and neurofibrillary tangles (NFT) typically found in the cerebral cortex, hippocampus, and basal forebrain. Increasing evidence suggests that the major constituent of NP, a B-amyloid protein(BAP) composed of 39-42 amino acids, possesses neurotoxic properties. It has been reputed that the neurotoxic properties of BAP(1-40) may be dependent on the aggregational state of the peptide. Recent studies have demonstrated in vitro that a fragment of the B-amyloid protein, BAP(25-35), disrupts intracellular calcium homeostasis, decreases neuronal survival, and potentiates the toxicity of excitatory amino acids (EAA). While some evidence supports …
The Effects Of Session Time And Satiation On The Form Of The Vi Response Function, Laura Campbell '93
The Effects Of Session Time And Satiation On The Form Of The Vi Response Function, Laura Campbell '93
Honors Projects
There has been considerable recent controversy over the empirical form of the function relating response rate to reinforcement rate on Variable Interval (VI) schedules. Some theories (matching, for example) predict a monotonic relationship between response rate and reinforcement rate. Other theories (behavioral economics, for example) predict a bitonic relationship. There is empirical support for both positions. Recently, Dougan, Kuh, and Vink (in press) have shown that session length is one variable which alters the form of the function. Functions were predominantly monotonic when sessions were short (10 minutes), and predominantly bitonic when sessions were long (30 minutes), when data from …