期刊
COGNITIVE SCIENCE
卷 33, 期 7, 页码 1232-1251出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1551-6709.2009.01054.x
关键词
Fear conditioning; Latent inhibition; Preparedness; Social groups; Kalman filter
Humans display more conditioned fear when the conditioned stimulus in a fear conditioning paradigm is a picture of an individual from another race than when it is a picture of an individual from their own race (Olsson, Ebert, Banaji, & Phelps, 2005). These results have been interpreted in terms of a genetic Ohman, 2005; Olsson et al., 2005). However, the associability of conditioned stimuli is strongly influenced by prior exposure to those or similar stimuli. Using the Kalman filter, a normative statistical model, this article shows that superior fear conditioning to individuals from other groups is precisely what one would expect if participants perform optimal, Bayesian inference that takes their prior exposures to the different groups into account. There is therefore no need to postulate a genetic preparedness to learn to fear individuals from other races or social groups.
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