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How familiarity warps representation in the face space

Authors
  • Chauhan, Vassiki
  • Kotlewska, Ilona
  • Tang, Sunny
  • Gobbini, M. Ida
Type
Published Article
Journal
Journal of Vision
Publisher
The Association for Research in Vision and Ophthalmology
Publication Date
Jul 21, 2020
Volume
20
Issue
7
Identifiers
DOI: 10.1167/jov.20.7.18
PMID: 32692827
PMCID: PMC7424121
Source
PubMed Central
Keywords
License
Green

Abstract

Recognition of familiar as compared to unfamiliar faces is robust and resistant to marked image distortion or degradation. Here we tested the flexibility of familiar face recognition with a morphing paradigm where the appearance of a personally familiar face was mixed with the appearance of a stranger ( Experiment 1 ) and the appearance of one's own face with the appearance of a familiar face and the appearance of a stranger ( Experiment 2 ). The aim of the two experiments was to assess how categorical boundaries for recognition of identity are affected by familiarity. We found a narrower categorical boundary for the identity of personally familiar faces when they were mixed with unfamiliar identities as compared to the control condition, in which the appearance of two unfamiliar faces was mixed. Our results suggest that familiarity warps the representational geometry of face space, amplifying perceptual distances for small changes in the appearance of familiar faces that are inconsistent with the structural features that define their identities.

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