The purpose of this study was to investigate whether or not infants who had experienced different types of naturally-occurring, significant separations from an attachment figure during the first year of life differed in their response to separation at 12 months of age. Thirty-three 12-month-old Caucasian infants from middle class, intact families…

This demonstration study examines the affective reactions of infants when they imitate or fail to imitate play behavior modeled by an adult. Subjects were twenty-four 18-month-old and twenty-four 24-month-old male and female infants. Each infant visited the laboratory twice with an inter-session interval of 48 hours. At each session, the infant…