The Little Albert experiment
Through stimulus generalization, Little Albert came to fear furry things, including Watson in a Santa Claus mask.
Source
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"CNX Psychology, Psychology. July 23, 2015."
http://cnx.org/contents/4abf04bf-93a0-45c3-9cbc-2cefd46e68cc@4.100:34/Psychology
OpenStax CNX
CC BY 4.0.