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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

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Published on: March 1, 2022

Does flexibility in perceptual organization compete with automatic grouping?

Mitsouko van Assche1, Pierre Gos, Anne Giersch

  • 1INSERM, Department of Psychiatry, Centre Hospitalier RĂ©gional Universitaire de Strasbourg, Strasbourg, France.

Journal of Vision
|February 8, 2012
PubMed
Summary
This summary is machine-generated.

Mental "re-grouping" of visual objects differs from automatic grouping. Re-grouping allows efficient prioritization but does not reduce the cost of across-hemifield visual search, suggesting distinct cognitive outputs.

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • Segregated visual objects can be mentally re-grouped for simultaneous processing.
  • The cognitive mechanisms and outcomes of re-grouping versus automatic grouping are not fully understood.
  • Investigating whether re-grouping and automatic grouping produce identical or distinct perceptual outputs is crucial.

Purpose of the Study:

  • To compare the effects of automatic grouping and mental re-grouping on visual search performance.
  • To determine if re-grouping alters the cost associated with stimuli presented across visual hemifields.
  • To elucidate the relationship between ongoing perception and mental exploration.

Main Methods:

  • Participants identified target pairs within a visual display of alternating shapes.
  • Eye tracking confirmed central fixation throughout the experiment.
  • Stimuli were presented in the same or separate visual hemifields to measure performance costs.

Main Results:

  • A significant performance cost was observed when targets were presented across hemifields.
  • Participants efficiently prioritized unconnected target pairs when instructed, indicating re-grouping.
  • Re-grouping did not reduce the across-hemifield presentation cost, unlike automatic grouping.

Conclusions:

  • Mental re-grouping produces distinct cognitive outputs compared to automatic grouping.
  • Re-grouping complements, rather than replaces, representations formed by automatic grouping.
  • This finding contributes to understanding the interplay between mental exploration and continuous visual perception.