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Implicit expectation modulates multisensory perception.

Mick Zeljko1, Philip M Grove2, Ada Kritikos2

  • 1School of Psychology, The University of Queensland, St. Lucia, QLD, 4072, Australia. m.zeljko@uq.edu.au.

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|March 2, 2022
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Summary
This summary is machine-generated.

Implicit expectations, shaped by stimulus statistics, bias multisensory perception. This expectation effect influences cognitive processes in resolving perceptual ambiguity, not sensory input.

Keywords:
ExpectationMultisensory integrationPerceptual ambiguity

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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Sensory Perception

Background:

  • Perceptual history and stimulus statistics can shape implicit expectations.
  • These expectations may influence how individuals perceive sensory information, particularly in multisensory contexts.

Purpose of the Study:

  • To investigate how biased stimulus statistics and implicit expectations affect the perceptual resolution of a bistable visual stimulus modulated by sound.
  • To determine whether expectation influences integrated audio-visual stimuli differently from visual-only or unintegrated audio-visual stimuli.
  • To differentiate between sensory and interpretational effects of expectation on multisensory integration.

Main Methods:

  • Three experiments were conducted manipulating perceptual history by biasing stimulus statistics.
  • Participants' responses to a bistable visual stimulus modulated by sound were analyzed.
  • The influence of expectation on integrated, unintegrated audio-visual, and visual-only stimuli was compared.

Main Results:

  • Responses were generally biased towards the implicitly expected outcome, aligning with biased stimulus statistics.
  • Expectation significantly affected integrated audio-visual stimuli but not visual-only or unintegrated audio-visual stimuli.
  • Contrary to predictions, expecting integrated audio-visual stimuli impaired multisensory integration compared to other conditions.

Conclusions:

  • Perceptual experience implicitly generates expectations that modulate multisensory perception, focusing on perceptual outcomes rather than raw sensory input.
  • The expectation effect in resolving perceptual ambiguity primarily involves cognitive processes rather than sensory alterations.