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Exogenous attention to unseen objects?

Liam J Norman1, Charles A Heywood1, Robert W Kentridge1

  • 1Psychology Department, University of Durham, Durham DH1 3LE, UK.

Consciousness and Cognition
|April 30, 2015
PubMed
Summary
This summary is machine-generated.

Exogenous attention can selectively influence behavior towards stimuli without leading to awareness. This study demonstrates exogenous object-based attention even when stimuli remain undetected, supporting a dissociation between attention and awareness.

Keywords:
AttentionConsciousnessMaskingObject perception

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Attention and awareness are distinct cognitive processes.
  • Not all attended stimuli reach conscious awareness.
  • The relationship between attention types (endogenous vs. exogenous) and awareness is debated.

Purpose of the Study:

  • To investigate if exogenous attention can operate without awareness.
  • To determine if object-based attention can be driven exogenously without conscious perception.
  • To validate methods for assessing unawareness in attention tasks.

Main Methods:

  • Utilized an object-based attention task with modified cue-target contingencies to isolate exogenous control.
  • Employed signal detection task procedures to rigorously confirm stimulus unawareness.
  • Compared attentional effects under conditions where stimuli were undetectable.

Main Results:

  • Demonstrated evidence of exogenous object-based attention influencing behavior on stimuli that remained unseen.
  • Confirmed that attentional effects persist even when target stimuli are below the threshold of awareness.
  • Validated the findings using appropriate signal detection methods.

Conclusions:

  • Exogenous attention can operate independently of awareness.
  • A dissociation between attention and awareness is demonstrable for exogenous, object-based attention.
  • The findings contribute to understanding the mechanisms underlying attention and conscious perception.