ERIC Number: EJ784468
Record Type: Journal
Publication Date: 2008-Mar
Reference Count: 0
Asymmetry and Performance: Toward a Neurodevelopmental Theory
Boles, David B.; Barth, Joan M.; Merrill, Edward C.
Brain and Cognition, v66 n2 p124-139 Mar 2008
Hemispheric asymmetry implies the existence of developmental influences that affect one hemisphere more than the other. However, those influences are poorly understood. One simple view is that asymmetry may exist because of a relationship between a mental process' degree of lateralization and how well it functions. Data scaling issues have largely prevented such investigations, but it is shown that scaling effects are minimized after correction for ceiling and floor effects. After correction, lateralization-performance correlations are pervasive. However, while some correlations are positive, others are negative, with the direction depending on the underlying lateralized process. Two hypotheses are proposed that can account for these relationships by pointing either to individual differences in maturation of the corpus callosum or to developmental limits encountered at different ages of childhood. Their investigation should contribute toward a neurodevelopmental theory of hemispheric asymmetry.
Descriptors: Investigations, Scaling, Children, Brain Hemisphere Functions, Cognitive Processes, Correlation, Individual Differences, Brain, Child Development
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A