The Cerebral Hemispheres Cooperate to Perform Complex but Not Simple Tasks
Weissman, Daniel Howard
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https://hdl.handle.net/2142/82299
Description
Title
The Cerebral Hemispheres Cooperate to Perform Complex but Not Simple Tasks
Author(s)
Weissman, Daniel Howard
Issue Date
1999
Doctoral Committee Chair(s)
Banich, Marie T.
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Psychology, Psychobiology
Language
eng
Abstract
In four experiments, we examined whether task complexity determines the degree to which a division of processing across the hemispheres (i.e., across-hemisphere processing) underlies performance when within- and across-hemisphere processing are equally possible. When task complexity was relatively low, performance in a midline condition (which allowed for either within- or across-hemispheric processing) resembled within-hemisphere performance (Exps. 1 & 2). However, when task complexity was high, performance in a midline condition (Exps. 1 & 2) and a lateralized condition (which also allowed for either within- or across-hemisphere processing) (Exp. 3), resembled across-hemisphere performance. Our results complement and extend prior work (e.g., Banich & Belger, 1990) by indicating that the degree to which interhemispheric cooperation underlies performance changes with the complexity of the task being performed. This finding suggests that the hemispheres couple or uncouple their processing as a function of task complexity.
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