Abstract：
:How does the visual system represent the ensemble statistics of visual objects? This question has received intense interest in vision research, yet most studies have focused on the extraction of mean statistics rather than its dispersion. This study focuses on another aspect of ensemble statistics: the redundancy of the sample. In two experiments, participants were faster judging the facial expression and gender of multiple faces than a single face. The redundancy gain was equivalent for multiple identical faces and for multiple faces of different identities. To test whether the redundancy gain was due to increased strength in perceptual representation, we measured the magnitude of facial expression aftereffects. The aftereffects were equivalent when induced by a single face and by four identical faces, ruling out increased perceptual strength as an explanation for the redundancy gain. We conclude that redundant faces facilitate perception by enhancing the robustness of representation of each face.
journal_name
Vision Resjournal_title
Vision researchauthors
Won BY,Jiang YVdoi
10.1016/j.visres.2012.11.013subject
Has Abstractpub_date
2013-01-15 00:00:00pages
6-13eissn
0042-6989issn
1878-5646pii
S0042-6989(12)00388-4journal_volume
78pub_type
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