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Metacognitive Confidence Increases with, but Does Not Determine, Visual Perceptual Learning.

Leopold Zizlsperger1,2, Florian Kümmel3, Thomas Haarmeier3,4,5

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Perceptual learning enhances visual sensitivity and confidence, but not metacognitive sensitivity. Initial sensitivity, not metacognitive confidence, drives learning improvements in visual motion perception.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Perceptual learning improves objective sensitivity.
  • Metacognitive evaluation of perception is crucial but understudied.
  • Visual perception involves probabilistic inference and certainty assessment.

Purpose of the Study:

  • Investigate how perceptual learning affects the interaction between perception and metacognition.
  • Examine the role of metacognitive sensitivity and confidence in visual perceptual learning.
  • Assess the impact of transcranial alternating current stimulation (tACS) on these processes.

Main Methods:

  • Trained healthy human subjects on a visual motion perception task.
  • Measured perceptual sensitivity and confidence ratings.
  • Estimated metacognitive sensitivity using signal detection theory.
  • Applied 3Hz transcranial alternating current stimulation (tACS).

Main Results:

  • Perceptual sensitivity and confidence increased with training.
  • Metacognitive sensitivity did not improve with training.
  • tACS showed no significant effects on performance or confidence.
  • Initial perceptual sensitivity, not metacognitive measures, predicted learning gains.
  • Post-decision certainty covaried with objective performance.

Conclusions:

  • Perceptual learning enhances objective performance and confidence, but not metacognitive accuracy.
  • Metacognitive confidence tracks objective performance but doesn't drive learning.
  • The precise role of metacognitive confidence in visual perception requires further investigation.