A model of the mechanism for the perceived location of a single flash and two successive flashes presented around the time of a saccade.

Full Abstract

According to current accounts, the perceived location of a target flash presented in the dark around the time of a saccade comes largely from an extraretinal signal that begins to change before, and continues to change during and following the saccade. Opposed to this view, this study offers a model suggesting that the perception of a single flash or two successive flashes in association with a saccade is the result of the combined effects of flash retinal signal persistence and an extraretinal signal that begins concurrent with or shortly after the saccade. For a single flash, the retinal signal persistence interacting with the extraretinal signal is responsible for the perceived location of the flash. In the case of two flashes with a short inter-flash-interval, the temporal overlap of the first flash persistence with the second flash persistence is a major factor in determining the perceived location of both of the flashes, and as a consequence, the perceived separation between them.

Author information

Author/s: Pola, Jordan (J);

Affiliation: Department of Vision Sciences, State University of New York, State College of Optometry, New York, NY 10036, USA. jpola(-atsign-)sunyopt.edu

Journal and publication information

Publication Type: Journal Article

Journal: Vision research (Vision Res), published in England. (Language: eng)

Reference: 2007-Sep; vol 47 (issue 21) : pp 2798-813

Dates: Created 2007/09/26; Completed 2007/12/07;

PMID: 17767942, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

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