TY  - JOUR
PY  - 1985//
TI  - Reaction times to lateralized visual stimuli in callosal agenesis: stimulus and response factors
JO  - Neuropsychologia
A1  - Milner, A. D.
A1  - Jeeves, M. A.
A1  - Silver, P. H.
A1  - Lines, C. R.
A1  - Wilson, J.
SP  - 323
EP  - 331
VL  - 23
IS  - 3
N2  - A young acallosal man was intensively tested in a standard simple reaction time (RT) paradigm using briefly-presented lateralized spots for light. In Experiment 1, findings on previous acallosal patients of a large disadvantage for crossed (e.g. right hemifield-left hand) as against uncrossed (e.g. left hemifield-left hand) RTs were replicated. This crossed-uncrossed difference (CUD), as in previous work, turned out to be smaller in a bimanual response task than in the conventional unimanual task. Experiment 2 was a factorial study of unimanual RTs in which (a) stimulus intensity and (b) spatial S-R compatibility, were varied. As in a previously tested patient, decreased intensity resulted in a greatly increased CUD. S-R compatibility on the other hand had no effect on CUD. The results are interpreted as favouring a role for visual commissural neurones in the acallosal CUD, and as evidence against a spatial compatibility hypothesis.<p /> <p>Language: en</p>
LA  - en
SN  - 0028-3932
UR  - http://dx.doi.org/
ID  - ref1
ER  -