Abstract
This study explored "the effect of adaptation on facial expressions" using Japanese facial expressions. The effect of adaptation is the phenomenon that the rate of identifying facial expressions decreased when a subject perceived a similar category of facial expression after being exposed to it for a few seconds. The participants were asked to identify the emotion category of the test stimuli that were presented for 200ms subsequent to the adaptation stimuli (facial expressions of anger, fear, happiness, and sadness) that were presented for 5s. Both, Experiment1, which used the same person for the adaptation and the test stimuli, and Experiment2, which used different person, showed that adaptation had an effect on facial expressions of anger and happiness. In addition, it also suggested the effect on facial expressions of fear and sadness.
