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Related Experiment Videos

Working memory can guide pop-out search.

David Soto1, Glyn W Humphreys, Dietmar Heinke

  • 1Behavioural Brain Sciences, School of Psychology, University of Birmingham, Birmingham B15 2TT, UK. d.soto@bham.ac.uk

Vision Research
|November 1, 2005
PubMed
Summary
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Working memory (WM) top-down feedback influences visual search, even for easy pop-out targets. This top-down search modulates selection by affecting response times and eye movements.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Working memory (WM) exerts top-down control over visual selection, particularly for difficult targets.
  • Previous research indicates WM influences early and involuntary visual processing.

Purpose of the Study:

  • To investigate if WM top-down feedback affects visual search for salient, pop-out targets.
  • To determine if WM guidance can override strong bottom-up visual cues.

Main Methods:

  • Participants memorized a prime (target or distractor) before a visual search task.
  • Visual search arrays contained easily discriminable targets and distractors.
  • Response latencies and initial saccade direction were recorded.

Main Results:

Related Experiment Videos

  • WM primes significantly affected response latencies.
  • The direction of the first saccade was influenced by WM content.
  • These effects occurred even with easily discriminable pop-out targets.

Conclusions:

  • Top-down search, guided by WM, modulates visual selection.
  • WM influences visual attention even when salient bottom-up cues are present.
  • This suggests WM plays a crucial role in prioritizing visual information.