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Subitizing object parts reveals a second stage of individuation

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Poncet_2020_PBR_Subitizing_CC.pdf (585.8Kb)
Date
17/11/2020
Author
Poncet, Marlene
Chakravarthi, Ramakrishna
Keywords
Subitizing
Visual attention
Enumeration
Object recognition
Individuation
BF Psychology
DAS
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Abstract
Humans can efficiently individuate a small number of objects. This subitizing ability is thought to be a consequence of limited attentional resources. However, how and what is selected during the individuation process remain outstanding questions. We investigated these in four experiments by examining if parts of objects are enumerated as efficiently as distinct objects in the presence and absence of distractor objects. We found that distractor presence reduced subitizing efficiency. Crucially, parts connected to multiple objects were enumerated less efficiently than independent objects or parts connected to a single object. These results argue against direct individuation of parts and show that objecthood plays a fundamental role in individuation. Objects are selected first and their components are selected in subsequent steps. This reveals that individuation operates sequentially over multiple levels.
Citation
Poncet , M & Chakravarthi , R 2020 , ' Subitizing object parts reveals a second stage of individuation ' , Psychonomic Bulletin & Review , vol. First Online . https://doi.org/10.3758/s13423-020-01836-2
Publication
Psychonomic Bulletin & Review
Status
Peer reviewed
DOI
https://doi.org/10.3758/s13423-020-01836-2
ISSN
1069-9384
Type
Journal article
Rights
Copyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
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  • University of St Andrews Research
URL
https://link.springer.com/article/10.3758%2Fs13423-020-01836-2#Sec30
URI
http://hdl.handle.net/10023/21008

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