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Perceptual anchoring effects: Evidence of response bias and a change in estimates sensitivity

2023Journal article Open access
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dc.contributor.authorGarcia-Marques, Teresa
dc.contributor.authorFernandes, Alexandre
dc.date.accessioned2024-03-14T17:05:26Z
dc.date.available2024-03-14T17:05:26Z
dc.date.issued2023
dc.description.abstractIntroduction: People's estimates of perceptual quantities are commonly biased by the contextual presence of other quantities (like numbers). In this study, we address assimilation anchoring effects (approximation of real quantities to contextual quantities) that occur for visually displayed proportions, defining a new methodological setting for the effect. Method: Similar to classic approaches, we asked participants across several trials whether the display contained a feature in a proportion higher or lower than “a randomly selected value” (relative judgments), and then estimated the feature proportions (absolute judgments). Across all trials, we presented seven anchors ranging from.20 to.80, each with a visually displayed representation of the same seven proportions (49 judgments in total). This allowed for a psychophysical approach to individual estimates and signal detection indexes, providing new insights into how the anchoring effect is generated in this setting. Results: Our findings suggest that anchoring effects occur both as a bias (changes in response criteria) and as a change in the ability to discriminate stimuli (affecting sensitivity indexes). Moreover, anchors modulate the level of stimuli features for which estimates were more uncertain. Finally, our results indicate that anchor effects occur immediately in the first phase of the two-phase paradigm, leading to the availability of values for supporting absolute estimates. Conclusion: By using a psychophysical approach to the anchoring effects, for the first time, we could clarify that this effect is the result of both bias and changes in the ability to discriminate quantity. © 2023 The Authors. Brain and Behavior published by Wiley Periodicals LLC.pt_PT
dc.description.sponsorshipFundação para a Ciência e Fecnologia - FCTpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGarcia, M. T., & Fernandes, A. (2023). Perceptual anchoring effects: Evidence of response bias and a change in estimates sensitivity. Brain & Behavior, 13(11), 1–16. https://doi.org/10.1002/brb3.3254pt_PT
dc.identifier.doi10.1002/brb3.3254pt_PT
dc.identifier.issn21623279
dc.identifier.urihttp://hdl.handle.net/10400.12/9671
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherJohn Wiley & Sons Inc.pt_PT
dc.relationPTDC/PSI-GER/28850/2017pt_PT
dc.relationUIDB/04810/2020pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAbsolute/relativemate estispt_PT
dc.subjectAnchoring effectspt_PT
dc.subjectPsychophysicspt_PT
dc.subjectSignal detection approachpt_PT
dc.titlePerceptual anchoring effects: Evidence of response bias and a change in estimates sensitivitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceUnited Statespt_PT
oaire.citation.issue11pt_PT
oaire.citation.titleBrain and Behaviorpt_PT
oaire.citation.volume13pt_PT
person.familyNameGarcia-Marques
person.givenNameTeresa
person.identifier.ciencia-idA71A-4DF9-9760
person.identifier.orcid0000-0002-6233-0799
person.identifier.ridP-4149-2015
person.identifier.scopus-author-id13805497600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc0f30712-5b70-4695-9b5c-b16c493956c0
relation.isAuthorOfPublication.latestForDiscoveryc0f30712-5b70-4695-9b5c-b16c493956c0

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