What does this research mean for the field?

Behavior and pupil dilations during low-level auditory perceptual decision-making align with Bayesian principles of belief updating, indicating that locus coeruleus-noradrenaline arousal modulation is a domain-general mechanism across temporal and spatial auditory perception. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

Determine whether pupil dilation reflecting locus coeruleus-noradrenaline arousal mediates perceptual belief updating across temporal and spatial auditory processing domains.

August 27, 2026Communications PsychologyOpen Access

Pupil dilation indicates arousal-related mediation of perceptual belief updating across auditory domains

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Authors

RFRoman Fleischmann DMDavid Meijer BBBurcu Bayram

Discussion

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Overview

Psychophysical study demonstrates pupil dilation tracks perceptual belief updating during auditory tasks in healthy adults, indicating domain-general arousal modulation by the noradrenaline system.

Key Points

Determine whether pupil dilation reflecting locus coeruleus-noradrenaline arousal mediates perceptual belief updating across temporal and spatial auditory processing domains.
Tested 46 participants performing rapid auditory sequence discrimination tasks categorized into a temporal group (acceleration vs. deceleration, N = 24) and a spatial group (clockwise vs. counterclockwise movement, N = 22) under high uncertainty.
Extracted stimulus-evoked pupil dilations using a deconvolution-based general linear model applied to continuous pupillometry recordings.
Fitted a Bayesian observer model to behavioral responses to estimate stimulus-level information gain and surprisal values.
Participant behavioral choices and pupil dilations exhibited strong sensitivity to the occurrence of latent state change-points.
Information gain and surprisal both significantly predicted pupil dilations across domains, with information gain outperforming surprisal in model comparisons.
Model comparisons favored domain-general models over domain-specific models, indicating a uniform locus coeruleus-noradrenaline modulation across auditory modalities.

Cite This Study

Fleischmann et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe98110c91c1e9262126f https://doi.org/10.1038/s44271-026-00519-3

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August 27, 2026Communications PsychologyOpen Access

Pupil dilation indicates arousal-related mediation of perceptual belief updating across auditory domains

View Full Paper

Ask AI

Bookmark

Authors

RFRoman Fleischmann DMDavid Meijer BBBurcu Bayram

Discussion

Member takes

Overview

Psychophysical study demonstrates pupil dilation tracks perceptual belief updating during auditory tasks in healthy adults, indicating domain-general arousal modulation by the noradrenaline system.

Key Points

Determine whether pupil dilation reflecting locus coeruleus-noradrenaline arousal mediates perceptual belief updating across temporal and spatial auditory processing domains.
Tested 46 participants performing rapid auditory sequence discrimination tasks categorized into a temporal group (acceleration vs. deceleration, N = 24) and a spatial group (clockwise vs. counterclockwise movement, N = 22) under high uncertainty.
Extracted stimulus-evoked pupil dilations using a deconvolution-based general linear model applied to continuous pupillometry recordings.
Fitted a Bayesian observer model to behavioral responses to estimate stimulus-level information gain and surprisal values.
Participant behavioral choices and pupil dilations exhibited strong sensitivity to the occurrence of latent state change-points.
Information gain and surprisal both significantly predicted pupil dilations across domains, with information gain outperforming surprisal in model comparisons.
Model comparisons favored domain-general models over domain-specific models, indicating a uniform locus coeruleus-noradrenaline modulation across auditory modalities.

Cite This Study

Fleischmann et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe98110c91c1e9262126f https://doi.org/10.1038/s44271-026-00519-3

View Full Paper

Ask AI

Bookmark