Walther, Christian and Schweinberger, Stefan R. and Kovacs, Gyula (2014) Decision-dependent aftereffects for faces. VISION RESEARCH, 100. pp. 47-55. ISSN 0042-6989, 1878-5646
Full text not available from this repository. (Request a copy)Abstract
Adaptation-related aftereffects (AEs) have been found in the perception of face identity, in that perception of an ambiguous face is typically biased away from the identity of a preceding unambiguous adaptor face. In previous studies, we could show that both perceptual ambiguity and physical similarity play a role in determining perceived face identity AEs, Cortex 49 (2013) 1963-1977, Plos One 8 (2013) e70525. Here, we tested further the role of ambiguity by manipulating participants' task such that the very same target stimuli were either ambiguous or unambiguous regarding stimulus classification. We created two partially overlapping continua spanning three unfamiliar face identities each, by morphing identity A via B to C, and B via C to D. In a first session, participants were familiarised with faces A and C and asked to classify faces of the A-B-C continuum as either identity A or C in an AE paradigm. Following adaptation to A or C, we observed contrastive AEs for the ambiguous identity B, but not for the unambiguous identities A or C. In a second session, the same participants were familiarised with faces B and D, followed by tests of AEs for the B-C-D continuum now involving a B-D classification task. We again observed contrastive AEs but only for target identity C (ambiguous for the decision) and not for B or D (unambiguous). Our results suggest that perceptual ambiguity, as given by the task-context, determines whether or not AEs are induced. (C) 2014 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VISUAL-ADAPTATION; UNFAMILIAR FACES; CATEGORICAL PERCEPTION; FAMILIAR FACES; RECOGNITION; IDENTITY; REPRESENTATIONS; BRAIN; DISTINCTIVENESS; PSYCHOPHYSICS; Face perception; Adaptation; Identity; Plasticity |
| Subjects: | 100 Philosophy & psychology > 100 Philosophy |
| Divisions: | Psychology and Pedagogy > Institut für Psychologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Oct 2019 12:35 |
| Last Modified: | 17 Oct 2019 12:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9989 |
Actions (login required)
 |
View Item |
