Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/33837
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Type: Journal article
Title: Seeing and ballistic pointing at perisaccadic targets
Author: Morrone, M.
Ma-Wyatt, A.
Ross, J.
Citation: Journal of Vision, 2005; 5(9):741-754
Publisher: Association for Research in Vision and Ophthalmology
Issue Date: 2005
ISSN: 1534-7362
1534-7362
Statement of
Responsibility: 
M. Concetta Morrone, Anna Ma-Wyatt, John Ross
Abstract: We studied the effects of visual references and the level of illumination on the localization of stimuli flashed briefly near the start of saccades. A translucent shutter made it possible to remove visual references, but admit light, at different times after saccadic onset. The results show that post-saccadic visual references are not necessary for compression: a consistent compression of verbally reported relative stimulus distances is found at all shutter latencies and at all post-shutter levels of illumination. They also show that positions indicated by blind pointing show no compression except when visual references remain in view for a substantial time after saccades. These results confirm that the visual system uses multiple representations of space and suggest that it weights them differently for different tasks and different viewing conditions. No single map is used exclusively for conscious perception or for motor action, and conscious perception is always subject to compression at the time of saccades.
Keywords: Humans; Photic Stimulation; Space Perception; Psychomotor Performance; Saccades; Light; Darkness; Vision, Ocular
Description: Copyright © 2005 Association for Research in Vision and Ophthalmology
RMID: 0020063414
DOI: 10.1167/5.9.7
Published version: http://journalofvision.org/5/9/7/
Appears in Collections:Psychology publications

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