Influence of environmental statistics on inhibition of saccadic return.
Initiating an eye movement is slowed if the saccade is directed to a location that has been fixated in the recent past. We show that this inhibitory effect is modulated by the temporal statistics of the environment: If a return location is likely to become behaviorally relevant, inhibition of return is absent. By fitting an accumulator model of saccadic decision-making, we show that the inhibitory effect and the sensitivity to local statistics can be dissociated in their effects on the rate of accumulation of evidence, and the threshold controlling the amount of evidence needed to generate a saccade.
Farrell
Simon
S
Department of Experimental Psychology, University of Bristol, Bristol BS8 1TU, United Kingdom. Simon.Farrell@bristol.ac.uk
Ludwig
Casimir J H
CJ
Ellis
Lucy A
LA
Gilchrist
Iain D
ID
D055253:Color Vision; D003463:Cues; D003657:Decision Making; D004777:Environment; D005118:Extraterrestrial Environment; D005403:Fixation, Ocular; D007839:Functional Laterality; D006801:Humans; D008954:Models, Biological; D010775:Photic Stimulation; D011336:Probability; D011930:Reaction Time; D012438:Saccades / Q000502:physiology*