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Motivational Effects On A Psychometric Measure Of Prefrontal Brain Functioning In Patients With Chronic Schizophrenia And Related Disorders, Paul C. Smith

Dissertations

This study compared multiple sequential performances on a computerized version of the Wisconsin Card Sorting Test (Grant & Berg, 1948; Harris, 1986) by adult men receiving institutional inpatient treatment for chronic schizophrenia and related disorders. Participants were exposed to differential test conditions of minimal post-session non-contingent token reinforcement (baseline phases) and enhanced intra-session performance-contingent token reinforcement (experimental phase). Each major participant resided at the same continuing treatment unit at Kalamazoo Regional Psychiatric Hospital receiving similar social therapies but idiosyncratic psychotropic medication regimens, changes in which were tracked in relation to test performances. A simple single-subject reversal design was employed with …