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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Object-based attention: shifting or uncertainty?

Leslie Drummond1, Sarah Shomstein

  • 1Department of Psychology, George Washington University, Washington, DC 20052, USA. drummond@gwmail.gwu.edu

Attention, Perception & Psychophysics
|October 19, 2010
PubMed
Summary
This summary is machine-generated.

Object-based attention guides visual processing through attentional prioritization, not attentional shifting. This occurs when target locations are certain, influencing how we select objects.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Object-based attentional guidance is key to visual processing.
  • Space-based attention is understood, but object-based attention mechanisms are unclear.
  • Two hypotheses exist: attentional prioritization vs. attentional shifting.

Purpose of the Study:

  • To determine whether object-based attention relies on attentional prioritization or attentional shifting.
  • To differentiate between the attentional prioritization and attentional shifting hypotheses.
  • To clarify the underlying mechanisms of object-based attentional selection.

Main Methods:

  • Four experiments were conducted.
  • Manipulated certainty of target location.
  • Varied attention shifting and stimulus onset asynchrony.

Main Results:

  • Object-based effects were solely dependent on target location certainty.
  • Attentional prioritization, not attentional shifting, drives object-based effects.
  • Confirmed the attentional prioritization account of object-based attention.

Conclusions:

  • Object-based attentional guidance is driven by attentional prioritization.
  • Findings provide constraints for understanding object-based selection mechanisms.
  • Supports the role of certainty in object-based attentional selection.