An implicit representation of stimulus ambiguity in pupil size
| Autor: | Paul Egré, Jackson Graves, Daniel Pressnitzer, Vincent de Gardelle |
|---|---|
| Přispěvatelé: | Laboratoire des systèmes perceptifs (LSP), Département d'Etudes Cognitives - ENS Paris (DEC), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut Jean-Nicod (IJN), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École des hautes études en sciences sociales (EHESS)-Collège de France (CdF (institution))-Centre National de la Recherche Scientifique (CNRS)-Département de Philosophie - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Centre d'économie de la Sorbonne (CES), Université Paris 1 Panthéon-Sorbonne (UP1)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Auditory perception genetic structures media_common.quotation_subject Social Sciences Stimulus (psychology) Judgment 03 medical and health sciences [SCCO]Cognitive science 0302 clinical medicine Perception Pupillary response Humans 030304 developmental biology media_common 0303 health sciences Multidisciplinary Uncertainty Pupil Ambiguity Awareness Tritone paradox Acoustic Stimulation Auditory Perception Visual Perception Female Pitch shift Psychology 030217 neurology & neurosurgery Pupillometry Cognitive psychology |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2021, 118 (48), pp.e2107997118. ⟨10.1073/pnas.2107997118⟩ Proc Natl Acad Sci U S A |
| ISSN: | 0027-8424 1091-6490 |
| DOI: | 10.1073/pnas.2107997118⟩ |
| Popis: | International audience; To guide behavior, perceptual systems must operate on intrinsically ambiguous sensory input. Observers are usually able to acknowledge the uncertainty of their perception, but in some cases, they critically fail to do so. Here, we show that a physiological correlate of ambiguity can be found in pupil dilation even when the observer is not aware of such ambiguity. We used a well-known auditory ambiguous stimulus, known as the tritone paradox, which can induce the perception of an upward or downward pitch shift within the same individual. In two experiments, behavioral responses showed that listeners could not explicitly access the ambiguity in this stimulus, even though their responses varied from trial to trial. However, pupil dilation was larger for the more ambiguous cases. The ambiguity of the stimulus for each listener was indexed by the entropy of behavioral responses, and this entropy was also a significant predictor of pupil size. In particular, entropy explained additional variation in pupil size independent of the explicit judgment of confidence in the specific situation that we investigated, in which the two measures were decoupled. Our data thus suggest that stimulus ambiguity is implicitly represented in the brain even without explicit awareness of this ambiguity. |
| Databáze: | OpenAIRE |
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