Transsaccadic integration operates independently in different feature dimensions

Garry Kong*, David Aagten-Murphy, Jessica M.V. McMaster, Paul M. Bays

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Our knowledge about objects in our environment reflects an integration of current visual input with information from preceding gaze fixations. Such a mechanism may reduce uncertainty but requires the visual system to determine which information obtained in different fixations should be combined or kept separate. To investigate the basis of this decision, we conducted three experiments. Participants viewed a stimulus in their peripheral vision and then made a saccade that shifted the object into the opposite hemifield. During the saccade, the object underwent changes of varying magnitude in two feature dimensions (Experiment 1, color and location; Experiments 2 and 3, color and orientation). Participants reported whether they detected any change and estimated one of the postsaccadic features. Integration of presaccadic with postsaccadic input was observed as a bias in estimates toward the presaccadic feature value. In all experiments, presaccadic bias weakened as the magnitude of the transsaccadic change in the estimated feature increased. Changes in the other feature, despite having a similar probability of detection, had no effect on integration. Results were quantitatively captured by an observer model where the decision whether to integrate information from sequential fixations is made independently for each feature and coupled to awareness of a feature change.

Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalJournal of Vision
Volume21
Issue number7
DOIs
Publication statusPublished - 2021
Externally publishedYes

Keywords

  • computational modeling
  • feature integration
  • saccadic eye movements

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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