Modeling lag-2 revisits to understand trade-offs in mixed control of fixation termination during visual search

Hayward J. Godwin*, Erik D. Reichle, Tamaryn Menneer

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

An important question about eye-movement behavior is when the decision is made to terminate a fixation and program the following saccade. Different approaches have found converging evidence in favor of a mixed-control account, in which there is some overlap between processing information at fixation and planning the following saccade. We examined one interesting instance of mixed control in visual search: lag-2 revisits, during which observers fixate a stimulus, move to a different stimulus, and then revisit the first stimulus on the next fixation. Results show that the probability of lag-2 revisits occurring increased with the number of target-similar stimuli, and revisits were preceded by a brief fixation on the intervening distractor stimulus. We developed the Efficient Visual Sampling (EVS) computational model to simulate our findings (fixation durations and fixation locations) and to provide insight into mixed control of fixations and the perceptual, cognitive, and motor processes that produce lag-2 revisits.

Original languageEnglish
Pages (from-to)996-1019
Number of pages24
JournalCognitive Science
Volume41
Issue number4
DOIs
Publication statusPublished - May 2017
Externally publishedYes

Keywords

  • computational models
  • eye movements
  • lag-2 revisits
  • visual search

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