Yarrow K, Haggard P, Rothwell J C, 2006, "An extended perceived duration for multiple post-saccadic visual objects" Perception 35 ECVP Abstract Supplement
An extended perceived duration for multiple post-saccadic visual objects
K Yarrow, P Haggard, J C Rothwell
Judgments about the duration and onset time of stimuli seen following a saccadic eye movement are biased. These biases suggest that the brain antedates the perceptual onset of a saccade target to around the time of saccade initiation. This mechanism could explain the apparent continuity of visual perception across eye movements. Previously, antedating was measured only for a single visual object, that was also the saccade target. We explored whether antedating extended to other visual objects seen peripherally following a saccade. Subjects made saccades to a target letter in a group of one, five, or nine letters. They judged the duration for which they saw one of these letters presented in an altered post-saccadic colour. Regardless of the number of letters in the display, or the presence of advance information about which letter would change colour, subjects overestimated letter durations compared to constant fixation control conditions. We conclude that multiple post-saccadic objects are subject to antedating biases.
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