Interhemispheric processing in left- and right-handers.
Inter- and intrahemispheric processing for left- and right-handers were compared in two experiments. In one, subjects performed a digit-matching task and in the other they decided if two letters were part of a previously presented word. On some trials the matching items were presented initially only to one hemisphere (within-hemisphere trials), and hence the match decision could be reached by a hemisphere in isolation. On other trials, one item of the match pair was presented to each hemisphere (across-hemisphere trials), requiring interhemispheric interaction for the match decision. Patterns of performance on within-as compared to across-hemisphere trials were identical for the two handedness groups in both experiments. Furthermore, individual characteristics of subjects such as their hand posture, sex and family history of left-handedness did not affect the pattern of performance. These results suggest that interhemispheric processing may not differ between right- and left-handers.
Banich
M T
MT
Department of Psychology, University of Illinois, Champaign 61820.
Goering
S
S
Stolar
N
N
Belger
A
A
D001921:Brain / Q000502:physiology*; D004292:Dominance, Cerebral; D007839:Functional Laterality; D006801:Humans; D009483:Neuropsychological Tests; D011930:Reaction Time; D013850:Thinking / Q000502:physiology*; D014794:Visual Fields