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...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 107; no. 2; pp. 929 - 934
Main Authors Farrell, Simon, Ludwig, Casimir J.H, Ellis, Lucy A, Gilchrist, Iain D
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 12.01.2010
National Acad Sciences
Subjects
Behavior
Behavioral neuroscience
Biological Sciences
Circles
Color Vision
Cues
Decision Making
Empirical evidence
Environment
Environmental sciences
Extraterrestrial Environment
Eye movements
Fixation, Ocular
Functional Laterality
Humans
Modeling
Models, Biological
Participant observation
Photic Stimulation
Probabilities
Probability
Quadrants
Reaction Time
Saccades
Saccades - physiology
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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Edited by Richard M. Shiffrin, Indiana University, Bloomington, IN, and approved November 25, 2009 (received for review June 18, 2009)
Author contributions: S.F., C.J.H.L., and I.D.G. designed research; S.F., C.J.H.L., and L.A.E. performed research; S.F., C.J., and L.A.E. analyzed data; and S.F., C.J.H.L., and I.D.G. wrote the paper.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.0906845107