Qualitative hemispheric differences in semantic category matching. |
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| Authors: | K I Taylor P Brugger D Weniger M Regard |
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| Institution: | Department of Neurology, University Hospital Zürich, Zürich, Switzerland. |
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| Abstract: | A unilateral category matching task with words as stimuli was employed to investigate semantic processing in the right and left hemispheres (RH, LH). An overall right visual field (RVF)/LH dominance was observed and performances were better than chance, also in the left visual field (LVF)/RH. A qualitative analysis of reaction times with individual differences multidimensional scaling (INDSCAL) revealed that LVF/RH INDSCAL solutions were significantly more differentiated in structure than RVF/LH solutions in terms of number and size of dimensions. These findings support a depth of activation hypothesis of hemispheric processing, with the LH rapidly and focally and the RH slowly and diffusely activating the semantic network. |
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