A model of the mechanism for the perceived location of a single flash and two successive flashes presented around the time of a saccade.
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.
Pola
Jordan
J
Department of Vision Sciences, State University of New York, State College of Optometry, New York, NY 10036, USA. jpola@sunyopt.edu
D006801:Humans; D008960:Models, Psychological; D009039:Motion Perception / Q000502:physiology; D010775:Photic Stimulation; D011601:Psychophysics; D011930:Reaction Time; D012160:Retina / Q000502:physiology; D012438:Saccades / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*