ERIC Number: EJ781874
Record Type: Journal
Publication Date: 2008
Reference Count: 0
Cognitive Abilities Independent of IQ Correlate with Regional Brain Structure
Johnson, Wendy; Jung, Rex E.; Colom, Roberto; Haier, Richard J.
Intelligence, v36 n1 p18-28 Jan-Feb 2008
There is increasing evidence relating psychometric measures of general intelligence and reasoning to regional brain structure and function assessed with a variety of neuroimaging techniques. Cognitive dimensions independent of general intelligence can also be identified psychometrically and studied for any neuroanatomical correlates. Here we investigated two such dimensions, rotation-verbal and focus-diffusion. We used structural MRI and voxel-based morphometry (VBM) in two independent samples to identify gray and white matter correlates of both dimensions. Based on statistical conjunction of both samples, (N=45; p less than 0.001), there were correlations with gray matter in Brodmann areas (BA) 20 and 9 involving the rotation-verbal dimension and in BA 18 involving the focus-diffusion dimension. There were white matter correlations involving the rotation-verbal dimension near BA 18, 40, 39, 10, 8, and 4 and involving the focus-diffusion dimension near BA 5 and the right sub-lobar amygdala. These correlations may have implications for understanding individual differences in the manifestation of intelligence.
Descriptors: Intelligence Quotient, Brain Hemisphere Functions, Neurological Organization, Individual Differences, Psychometrics, Cognitive Ability, Correlation
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A