Dissociation of hemifield reaction time differences from verbal stimulus directionality.

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Abstract
Examined 2 hypotheses explaining visual hemifield reaction time (RT) differences in 2 experiments with a total of 16 right-handed college students. The RTs to normally oriented and to mirror-image English words were compared in the right and left fields in order to decide whether cerebral dominance or scanning tendencies account for field superiority. Both types of words yielded faster verbal and manual RTs in the right visual field. This finding, as well as a supplementary finding of more accurate recognition for mirror-image words in the right visual field, support the cerebral dominance hypothesis. (19 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)