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Neuropsychologia. 1987;25(4):637-44.

Scanning the visual field without eye movements--a sex difference.

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Neurophysiology Biophysics Research Laboratory, V.A. Medical Center, Martinez, CA 94553.


Subjects identified the location of a briefly exposed target pattern in the presence of five other patterns. Right-handed females, but not males, exhibited a significantly higher error rate in correctly localizing the target pattern when it was in the left visual field, particularly for the left parafoveal region. This unexpected distribution of errors as a function of target location can be accounted for by a sequential (serial) mechanism which scans the visual field. Since the exposure time was too brief for eye movements to have occurred, the results must reflect an internal scan of the neural representation of the information retained in the visual system following the brief stimulus presentation.

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