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Feature-based guidance of attention during post-saccadic selection.

Andrew Hollingworth1, Michi Matsukura2,3

  • 1Department of Psychological and Brain Sciences, The University of Iowa, 11 Seashore Hall E, Iowa City, IA, 52242-1407, USA. andrew-hollingworth@uiowa.edu.

Attention, Perception & Psychophysics
|April 14, 2019
PubMed
Summary
This summary is machine-generated.

Object features automatically guide attention after eye movements, influencing visual search. This study shows pre-saccadic encoding and post-saccadic feature matching guide gaze correction.

Keywords:
Eye movementsFeature-based attentionMechanisms, eye movements and visual attentionVisual working memory

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Attention Studies

Background:

  • Models of trans-saccadic perception suggest saccade targets are localized near eye landing positions.
  • The specific attentional mechanisms involved in post-saccadic localization remain debated.
  • This study investigates automatic feature biasing in post-saccadic selection.

Purpose of the Study:

  • To determine if saccade target surface properties automatically bias post-saccadic selection.
  • To examine the role of feature encoding and working memory in trans-saccadic perception.
  • To elucidate the attentional mechanisms underlying visual search after saccades.

Main Methods:

  • A visual search task variant involving saccades to a shape-singleton target in a rotating array.
  • Manipulation of target and distractor colors on 'Switch' trials versus 'No-switch' control trials.
  • Measurement of gaze correction accuracy and latency to assess target localization.

Main Results:

  • Gaze correction to the saccade target was significantly impaired on Switch trials compared to No-switch trials.
  • This impairment occurred even when participants were incentivized to ignore target color.
  • Reversing feature roles (color/shape) yielded similar attentional biasing effects.

Conclusions:

  • Saccade target features are automatically encoded before a saccade.
  • These features are retained in visual working memory across the saccade.
  • Post-saccadic feature matching instantiates a selection process that biases attention toward matching objects.