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dc.contributor.authorCacciamani, Laura
dc.contributor.authorSkocypec, Rachel M
dc.contributor.authorFlowers, Colin S
dc.contributor.authorPerez, Diana C
dc.contributor.authorPeterson, Mary A
dc.date.accessioned2023-01-06T19:55:30Z
dc.date.available2023-01-06T19:55:30Z
dc.date.issued2022-11-15
dc.identifier.citationCacciamani, L., Skocypec, R. M., Flowers, C. S., Perez, D. C., & Peterson, M. A. (2023). BOLD activation on the groundside of figures: More suppression of grounds that competed more for figural status. Cortex, 158, 96–109.en_US
dc.identifier.pmid36495732
dc.identifier.doi10.1016/j.cortex.2022.10.011
dc.identifier.urihttp://hdl.handle.net/10150/667344
dc.description.abstractA fundamental aspect of object detection is assigning a border to one (figure) side but not the other (ground) side. Figures are shaped; grounds appear shapeless near the figure border. Accumulating evidence supports the view that the mechanism of figure assignment is inhibitory competition with the figure perceived on the winning side. Suppression has been observed on the groundside of figure borders. One prediction is that more suppression will be observed when the groundside competes more for figural status. We tested this prediction by assessing BOLD activation on the groundside of two types of stimuli with articulated borders: AEnov and AEfam stimuli. In both stimulus types, multiple image-based priors (symmetry, closure, small area, enclosure by a larger region) favored the inside as the figure. In AEfam but not AEnov stimuli, the figural prior of familiar configuration present on the outside competes for figural status. Observers perceived the insides of both types of stimuli as novel figures and the outsides as shapeless grounds. Previously, we observed lower BOLD activation in early visual areas representing the grounds of AEfam than AEnov stimuli, although unexpectedly, activation was above baseline. With articulated borders, it can be difficult to exclude figure activation from ground ROIs. Here, our ground ROIs better excluded figure activation; we also added straight-edge (SE) control stimuli and increased the sample size. In early visual areas representing the grounds, we observed lower BOLD activation on the groundside of AEfam than AEnov stimuli and below-baseline BOLD activation on the groundside of SE and AEfam stimuli. These results, indicating that greater suppression is applied to groundsides that competed more for figural status but lost the competition, support a Bayesian model of figure assignment in which proto-objects activated at both low and high levels where image features and familiar configurations are represented, respectively, compete for figural status.en_US
dc.language.isoenen_US
dc.publisherMasson SpAen_US
dc.rightsCopyright © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.subjectBayesian modelen_US
dc.subjectFigure-ground perceptionen_US
dc.subjectGround suppressionen_US
dc.subjectInhibitory competitionen_US
dc.subjectObject Detectionen_US
dc.subjectfMRIen_US
dc.titleBOLD activation on the groundside of figures: More suppression of grounds that competed more for figural statusen_US
dc.typeArticleen_US
dc.identifier.eissn1973-8102
dc.contributor.departmentDepartment of Psychology, University of Arizonaen_US
dc.contributor.departmentCognitive Science Program, University of Arizonaen_US
dc.identifier.journalCortexen_US
dc.description.noteOpen access articleen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleCortex; a journal devoted to the study of the nervous system and behavior
dc.source.volume158
dc.source.beginpage96
dc.source.endpage109
refterms.dateFOA2023-01-06T19:55:31Z
dc.source.countryItaly


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Copyright © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Except where otherwise noted, this item's license is described as Copyright © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).