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Related Experiment Videos

Action modulates object-based selection.

Karina J Linnell1, Glyn W Humphreys, Dave B McIntyre

  • 1Department of Psychology, Goldsmiths College, University of London, London SE14 6NW, United Kingdom. k.j.linnell@gold.ac.uk

Vision Research
|June 1, 2005
PubMed
Summary
This summary is machine-generated.

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Preparing to point disrupts object-based attention, favoring spatial selection. This suggests movement preparation alters how we process visual information, highlighting perception-action interactions.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Object-based attention facilitates discrimination within an object.
  • Previous research demonstrates attentional benefits for cued object parts.

Purpose of the Study:

  • Investigate how preparing a pointing movement affects object-based attention.
  • Determine if motor preparation prioritizes spatial over object-based selection.

Main Methods:

  • Participants prepared pointing movements to cued object locations.
  • Visual discrimination performance was measured under different attentional and motor conditions.
  • Experiments manipulated the relationship between movement targets, object boundaries, and stimulus locations.

Main Results:

Related Experiment Videos

  • Pointing preparation disrupted object-based attentional benefits.
  • Discrimination was equivalent for stimuli within the same object and outside the object when a pointing movement was prepared.
  • This effect persisted even when whole-object coding was necessary for movement execution.

Conclusions:

  • Pointing preparation may shift attention from object-based to spatial selection.
  • Motor preparation can alter the representations mediating perceptual selection.
  • Movement initiation has distinct effects on attention, separate from top-down cueing.