NDLI: Effects of task and task-switching on temporal inhibition of return, facilitation of return, and saccadic momentum during scene viewing.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mills, Mark Dalmaijer, Edwin S. Van der Stigchel, Stefan Dodd, Michael D.
Description	Author Affiliation: Mills M ( University of Nebraska-Lincoln.); Dalmaijer ES ( Utrecht University.); Van der Stigchel S ( Utrecht University.); Dodd MD ( University of Nebraska-Lincoln.)
Abstract	During scene viewing, saccades directed toward a recently fixated location tend to be delayed relative to saccades in other directions ('delay effect'), an effect attributable to inhibition of return (IOR) and/or saccadic momentum (SM). Previous work indicates this effect may be task-specific, suggesting that gaze control parameters are task-relevant and potentially affected by task-switching. Accordingly, the present study investigated task-set control of gaze behavior using the delay effect as a measure of task performance. The delay effect was measured as the effect of relative saccade direction on preceding fixation duration. Participants were cued on each trial to perform either a search, memory, or rating task. Tasks were performed either in pure-task or mixed-task blocks. This design allowed separation of switch-cost and mixing-cost. The critical result was that expression of the delay effect at 2-back locations was reversed on switch versus repeat trials such that return was delayed in repeat trials but speeded in switch trials. This difference between repeat and switch trials suggests that gaze-relevant parameters may be represented and switched as part of a task-set. Existing and new tests for dissociating IOR and SM accounts of the delay effect converged on the conclusion that the delay at 2-back locations was due to SM, and that task-switching affects SM. Additionally, the new test simultaneously replicated noncorroborating results in the literature regarding facilitation-of-return (FOR), which confirmed its existence and showed that FOR is 'reversed' SM that occurs when preceding and current saccades are both directed toward the 2-back location.
File Format	HTM / HTML
ISSN	00961523
Issue Number	5
Volume Number	41
e-ISSN	19391277
Journal	Journal of Experimental Psychology: Human Perception and Performance
Language	English
Publisher	American Psychological Assn.
Publisher Date	2015-10-01
Publisher Place	United States
Access Restriction	Subscribed
Subject Keyword	Discipline Psychology Executive Function Physiology Eye Movements Inhibition (psychology) Psychomotor Performance Visual Perception Adult Humans Saccades Young Adult Journal Article Research Support, N.i.h., Extramural
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Arts and Humanities Medicine Behavioral Neuroscience

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