文章基本信息

标题：Facial Age Aftereffects Provide Some Evidence for Local Repulsion (But None for Re-Normalisation)
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作者：Katherine R. Storrs
期刊名称：i-Perception
电子版ISSN：2041-6695
出版年度：2015
卷号：6
期号：2
页码：100-103
DOI：10.1068/i0725jc
出版社：Pion Ltd.
摘要：Face aftereffects can help adjudicate between theories of how facial attributes are encoded. O'Neil and colleagues ( 2014 ) compared age estimates for faces before and after adapting to young, middle-aged or old faces. They concluded that age aftereffects are best described as a simple re-normalisation—e.g. after adapting to old faces, all faces look younger than they did initially. Here I argue that this conclusion is not substantiated by the reported data. The authors fit only a linear regression model, which captures the predictions of re-normalisation, but not alternative hypotheses such as local repulsion away from the adapted age. A second concern is that the authors analysed absolute age estimates after adaptation, as a function of baseline estimates, so goodness-of-fit measures primarily reflect the physical ages of test faces, rather than the impact of adaptation. When data are re-expressed as aftereffects and fit with a nonlinear “locally repulsive” model, this model performs equal to or better than a linear model in all adaptation conditions. Data in O'Neil et al. do not provide strong evidence for either re-normalisation or local repulsion in facial age aftereffects, but are more consistent with local repulsion (and exemplar-based encoding of facial age), contrary to the original report.
关键词：adaptation ; face perception ; normalisation ; opponent coding ; visual aftereffects