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Related Experiment Videos

Visual marking and change detection.

Jose L Herrero1, Ros Crawley, Cees van Leeuwen

  • 1Department of Psychology, University of Sunderland, Sunderland, UK.

Cognitive Processing
|August 21, 2007
PubMed
Summary
This summary is machine-generated.

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Prior exposure to irrelevant objects aids visual search and working memory. Abrupt onset, visual marking, and perceptual segregation work together for time-based object selection.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Prior exposure to distractor objects can benefit visual search.
  • Explanations include top-down inhibition (visual marking), bottom-up abrupt onset capture, and asynchrony-dependent perceptual segregation.

Purpose of the Study:

  • To assess the relative contributions of abrupt onset and visual marking in visual search.
  • To investigate time-based selection of multiple objects for visual working memory storage.
  • To examine the role of perceptual segregation in this process.

Main Methods:

  • Combined visual search with a visual working memory task.
  • Utilized a change detection paradigm with distractor preview.
  • Varied preview exposure duration (short vs. long) across three experiments.

Related Experiment Videos

  • Manipulated stimulus complexity and change detection type to alter perceptual segregation.

    • Main Results:

    • Results indicate that abrupt onset, visual marking, and perceptual segregation are not mutually exclusive.
    • These factors appear to co-operate in the time-based selection of objects for working memory.

    Conclusions:

    • Bottom-up abrupt onset, top-down visual marking, and perceptual segregation all contribute to time-based selection for visual working memory.
    • These mechanisms interact to facilitate efficient information processing and memory encoding.