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Title:Resource allocation in dysthymia and anhedonia
Author(s):Yee, Cindy May
Doctoral Committee Chair(s):Miller, Gregory A.
Department / Program:Psychology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Psychology, Psychobiology
Psychology, Clinical
Psychology, Experimental
Abstract:Prior psychophysiological research has shown that dysthymic individuals are hyporesponsive during information processing tasks. This can be interpreted as evidence of a deficit in the availability or allocation of processing resources. The present research addressed this possibility by comparing dysthymics to anhedonic and normal control subjects in a dual-task paradigm. Reaction time, performance accuracy, and the P300 component of the event-related brain potential were employed as measures of the attentional resources directed to memory tasks, under conditions of varying task priority and difficulty. As expected, dysthymics and anhedonics did not differ from controls on performance measures. However, compared to control subjects, dysthymics and anhedonics responded differentially to priority manipulations as indexed by P300 amplitude. Specifically, dysthymics and anhedonics failed to show changes in resource allocation with shifts in task priority under certain conditions. Dysthymics and anhedonics also exhibited a consistently smaller P300. Taken together, the data suggest that dysthymics and anhedonics are deficient in the allocation of resources rather than the overall level of available resources.
Issue Date:1991
Rights Information:Copyright 1991 Yee, Cindy May
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9211049
OCLC Identifier:(UMI)AAI9211049

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