Programming of endogenous and exogenous saccades: evidence for a competitive integration model.
Participants were required to make a saccade to a uniquely colored target while ignoring the presentation of an onset distractor. The results provide evidence for a competitive integration model of saccade programming that assumes endogenous and exogenous saccades are programmed in a common saccade map. The model incorporates a lateral interaction structure in which saccade-related activation at a specific location spreads to neighboring locations but inhibits distant locations. In addition, there is top-down, location-specific inhibition of locations to which the saccade should not go. The time course of exogenous and endogenous activation in the saccade map can explain a variety of eye movement data, including endpoints, latencies, and trajectories of saccades and the well-known global effect.
Godijn
Richard
R
Department of Cognitive Psychology, Vrije Universiteit, Amsterdam, The Netherlands. rj.godijin@psy.vu.nl
Theeuwes
Jan
J
D000704:Analysis of Variance; D005133:Eye Movements; D006040:Goals; D006801:Humans; D008960:Models, Psychological; D009482:Neurophysiology; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D012438:Saccades / Q000502:physiology*; D013028:Space Perception; D014796:Visual Perception