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Article: Human depth sensitivity is affected by object plausibility

TitleHuman depth sensitivity is affected by object plausibility
Authors
KeywordsObject recognition
Behavior experiments
Depth information
Depth sensitivity
Euclidean Geometry
Issue Date2020
PublisherMIT Press. The Journal's web site is located at http://mitpress.mit.edu/jocn
Citation
Journal of Cognitive Neuroscience, 2020, v. 32 n. 2, p. 338-352 How to Cite?
AbstractUsing behavioral and fMRI paradigms, we asked how the physical plausibility of complex 3-D objects, as defined by the object's congruence with 3-D Euclidean geometry, affects behavioral thresholds and neural responses to depth information. Stimuli were disparity-defined geometric objects rendered as random dot stereograms, presented in plausible and implausible variations. In the behavior experiment, observers were asked to complete (1) a noise-based depth task that involved judging the depth position of a target embedded in noise and (2) a fine depth judgment task that involved discriminating the nearer of two consecutively presented targets. Interestingly, results indicated greater behavioral sensitivities of depth judgments for implausible versus plausible objects across both tasks. In the fMRI experiment, we measured fMRI responses concurrently with behavioral depth responses. Although univariate responses for depth judgments were largely similar across cortex regardless of object plausibility, multivariate representations for plausible and implausible objects were notably distinguishable along depth-relevant intermediate regions V3 and V3A, in addition to object-relevant LOC. Our data indicate significant modulations of both behavioral judgments of and neural responses to depth by object context. We conjecture that disparity mechanisms interact dynamically with the object recognition problem in the visual system such that disparity computations are adjusted based on object familiarity.
Persistent Identifierhttp://hdl.handle.net/10722/280345
ISSN
2023 Impact Factor: 3.1
2023 SCImago Journal Rankings: 1.402
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWONG, NHL-
dc.contributor.authorBan, H-
dc.contributor.authorChang, DHF-
dc.date.accessioned2020-02-07T07:39:48Z-
dc.date.available2020-02-07T07:39:48Z-
dc.date.issued2020-
dc.identifier.citationJournal of Cognitive Neuroscience, 2020, v. 32 n. 2, p. 338-352-
dc.identifier.issn0898-929X-
dc.identifier.urihttp://hdl.handle.net/10722/280345-
dc.description.abstractUsing behavioral and fMRI paradigms, we asked how the physical plausibility of complex 3-D objects, as defined by the object's congruence with 3-D Euclidean geometry, affects behavioral thresholds and neural responses to depth information. Stimuli were disparity-defined geometric objects rendered as random dot stereograms, presented in plausible and implausible variations. In the behavior experiment, observers were asked to complete (1) a noise-based depth task that involved judging the depth position of a target embedded in noise and (2) a fine depth judgment task that involved discriminating the nearer of two consecutively presented targets. Interestingly, results indicated greater behavioral sensitivities of depth judgments for implausible versus plausible objects across both tasks. In the fMRI experiment, we measured fMRI responses concurrently with behavioral depth responses. Although univariate responses for depth judgments were largely similar across cortex regardless of object plausibility, multivariate representations for plausible and implausible objects were notably distinguishable along depth-relevant intermediate regions V3 and V3A, in addition to object-relevant LOC. Our data indicate significant modulations of both behavioral judgments of and neural responses to depth by object context. We conjecture that disparity mechanisms interact dynamically with the object recognition problem in the visual system such that disparity computations are adjusted based on object familiarity.-
dc.languageeng-
dc.publisherMIT Press. The Journal's web site is located at http://mitpress.mit.edu/jocn-
dc.relation.ispartofJournal of Cognitive Neuroscience-
dc.rightsJournal of Cognitive Neuroscience. Copyright © MIT Press.-
dc.subjectObject recognition-
dc.subjectBehavior experiments-
dc.subjectDepth information-
dc.subjectDepth sensitivity-
dc.subjectEuclidean Geometry-
dc.titleHuman depth sensitivity is affected by object plausibility-
dc.typeArticle-
dc.identifier.emailChang, DHF: changd@hku.hk-
dc.identifier.authorityChang, DHF=rp02272-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1162/jocn_a_01483-
dc.identifier.pmid31633464-
dc.identifier.scopuseid_2-s2.0-85077469329-
dc.identifier.hkuros309018-
dc.identifier.volume32-
dc.identifier.issue2-
dc.identifier.spage338-
dc.identifier.epage352-
dc.identifier.isiWOS:000504866700012-
dc.publisher.placeUnited States-
dc.identifier.issnl0898-929X-

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