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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Computations underlying confidence in visual perception.

Morgan L Spence1, Paul E Dux1, Derek H Arnold1

  • 1School of Psychology, The University of Queensland.

Journal of Experimental Psychology. Human Perception and Performance
|November 24, 2015
PubMed
Summary
This summary is machine-generated.

Decision confidence and sensitivity are distinct cognitive processes. Signal variability impacts confidence more than sensitivity in visual judgments, revealing independent neural transformations.

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Area of Science:

  • Cognitive Neuroscience
  • Decision Making
  • Visual Perception

Background:

  • Humans assess decisions using confidence levels, which are correlated but distinct from sensitivity.
  • The underlying computational mechanisms differentiating confidence and sensitivity remain unclear.

Purpose of the Study:

  • To investigate how signal range influences decisional confidence and sensitivity in visual judgments.
  • To differentiate the computational processes of confidence and sensitivity.

Main Methods:

  • Visual judgments of global direction with stimuli of varying signal ranges and directional variability.
  • Equating sensitivity across different signal ranges to assess confidence.
  • Equating confidence across different signal ranges to assess sensitivity.
  • Control judgment of brightness to rule out general decisional confounds.

Main Results:

  • Signal range significantly impacted confidence, with greater variability leading to lower confidence, even when sensitivity was constant.
  • When confidence was equated, greater signal variability led to increased sensitivity.
  • Signal range did not affect an unrelated brightness judgment, supporting specificity of findings.

Conclusions:

  • Decisional confidence and directional sensitivity rely on independent transformations of sensory input.
  • Confidence is proposed to be shaped by the range of neural mechanisms during evidence accumulation, with less impact on sensitivity.