After effects in the perception of emotion following brief, masked adaptor faces

Van Rijsbergen, N. , Jannati, A. and Treves, A. (2008) After effects in the perception of emotion following brief, masked adaptor faces. Open Behavioral Science Journal, 2(1), pp. 36-52. (doi: 10.2174/1874230000802010036)

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<br>Adaptation aftereffects are the tendency to perceive an ambiguous target stimulus, which follows an adaptor stimulus, as different from the adaptor. A duration dependence of face adaptation aftereffects has been demonstrated for durations of at least 500ms, for identity related judgments. Here we describe the duration dependence of the adaptation aftereffects of very brief (11.7ms-500ms) backwardly masked faces, on both expression and identity category judgments of ambiguous target faces. We find significant aftereffects at minimum duration 23.5ms for emotional expression, and 47ms for identity, but these are abolished by backward masking with an inverted face, although these same adaptors can be correctly categorized above chance.</br> <br>The presence of a short duration adaptation effect in expression might be mediated by rapid transfer of low spatial frequency (LSF) information. We tested this possibility by comparing aftereffects in low pass and high pass filtered ambiguous targets, and found no evidence of independent adaptation of a LSF specific channel.</br>

Item Type:Articles
Glasgow Author(s) Enlighten ID:Van Rijsbergen, Dr Nicola
Authors: Van Rijsbergen, N., Jannati, A., and Treves, A.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
Journal Name:Open Behavioral Science Journal
Copyright Holders:Copyright © 2008 The Authors
First Published:First published in Open Behavioral Science Journal 2(1):36-52
Publisher Policy:Reproduced under a Creative Commons License

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