摘要：This study examined the effects of emotion inducing contexts on types of infants smiling. Facial expressions of forty-five 11-to 15-month-old infants were videotaped in an experimental lab with positive and negative emotional contests. Infants` smiling was identified as the Duchenne smile of non-Duchenne smile based on FACS(Facial Action Coding System,Ekman & Friesen,1978). Duration of smiling types was analyzed. Occurrence of Duchenne smiling was more likely in the positive than in the negative context and in the peek-a-boo than in the melody toy condition within the same positive context. Non-Duchenne smiling did not differ by context.
