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  • Title: Perceptual processing time differences owing to visual field asymmetries.
    Author: Carlsen AN, Maslovat D, Chua R, Franks IM.
    Journal: Neuroreport; 2007 Jul 02; 18(10):1067-70. PubMed ID: 17558298.
    Abstract:
    Recent experiments have reported increased endpoint accuracy for movements performed in the lower vs. the upper visual field, suggesting that there is superior feedback-based processing in the lower visual field owing to a visuomotor subsystem processing advantage. Differences, however, in the perceptual subsystem may also play a role in the lower visual field advantage. In this study, participants performed an inspection time task, a measure of perceptual processing time, requiring the identification of an asymmetrical 'pi' stimulus presented in the central, upper, or the lower visual field for a brief period. Significant differences between the percentage of correct identifications between visual fields indicated a lower visual field advantage over upper visual field for perceptual identification.
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