Is the whole really more than the sum of its parts? Estimates of average size and orientation are susceptible to object substitution masking

Jacoby, Oscar, Kamke, Marc R. and Mattingley, Jason B. (2013) Is the whole really more than the sum of its parts? Estimates of average size and orientation are susceptible to object substitution masking. Journal of Experimental Psychology: Human Perception and Performance, 439 1: 233-244. doi:10.1037/a0028762

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Author Jacoby, Oscar
Kamke, Marc R.
Mattingley, Jason B.
Title Is the whole really more than the sum of its parts? Estimates of average size and orientation are susceptible to object substitution masking
Journal name Journal of Experimental Psychology: Human Perception and Performance   Check publisher's open access policy
ISSN 0096-1523
1939-1277
Publication date 2013-02-01
Year available 2012
Sub-type Article (original research)
DOI 10.1037/a0028762
Open Access Status File (Author Post-print)
Volume 439
Issue 1
Start page 233
End page 244
Total pages 12
Place of publication Washington, DC, United States
Publisher American Psychological Association
Language eng
Abstract We have a remarkable ability to accurately estimate average featural information across groups of objects, such as their average size or orientation. It has been suggested that, unlike individual object processing, this process of feature averaging occurs automatically and relatively early in the course of perceptual processing, without the need for objects to be processed to the same extent as is required for individual object identification. Here, we probed the processing stages involved in feature averaging by examining whether feature averaging is resistant to object substitution masking (OSM). Participants estimated the average size (Experiment 1) or average orientation (Experiment 2) of groups of briefly presented objects. Masking a subset of the objects using OSM reduced the extent to which these objects contributed to estimates of both average size and average orientation. Contrary to previous findings, these results suggest that feature averaging benefits from late stages of processing, subsequent to the initial registration of featural information.
Keyword Statistical processing
Mean size judgment
Ensemble coding
Object substitution masking
Recurrent processing
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP110102925
Institutional Status UQ
Additional Notes Online First Publication: 28 May 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2013 Collection
School of Psychology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 16 times in Scopus Article | Citations
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Created: Fri, 09 Nov 2012, 02:24:18 EST by Debra McMurtrie on behalf of Queensland Brain Institute