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Autre publication scientifique Documents de travail du Centre d'Économie de la Sorbonne Année : 2023

From local to global estimations of confidence in perceptual decisions

Résumé

Perceptual confidence has been an important topic recently. However, one key limitation in current approaches is that most studies have focused on confidence judgments made for single decisions. In three experiments, we investigate how these local confidence judgments relate and contribute to global confidence judgments, by which observers summarize their performance over a series of perceptual decisions. We report two main results. First, we find that participants exhibit more overconfidence in their local than in their global judgments of performance, an observation mirroring the aggregation effect in knowledge-based decisions. We further show that this effect is specific to confidence judgments and does not reflect a calculation bias. Second, we document a novel effect by which participants' global confidence is larger for sets which are more heterogeneous in terms of difficulty, even when actual performance is controlled for. Surprisingly, we find that this effect of variability also occurs at the level of local confidence judgments, in a manner that fully explains the effect at the global level. Overall, our results indicate that global confidence is based on local confidence, although these two processes can be partially dissociated. We discuss possible theoretical accounts to relate and empirical investigations of how observers develop and use a global sense of perceptual confidence.
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Dates et versions

halshs-04075783, version 1 (20-04-2023)

Licence

Paternité - CC BY 4.0

Identifiants

  • HAL Id : halshs-04075783 , version 1

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Quentin Cavalan, Jean-Christophe Vergnaud, Vincent de Gardelle. From local to global estimations of confidence in perceptual decisions. 2023. ⟨halshs-04075783⟩
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Dernière date de mise à jour le 28/04/2024
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