A sample of 40 babies was observed in a variety of mildly challenging situations throughout their second year and in a series of follow-up assessments at age 31/2. Findings revealed two types of avoidant mechanism--wariness of the unfamiliar and fearfulness after exposure to a mildly difficult situation. (JMB)

In a study to assess young children's social interaction with peers, six male toddlers who were the only participants in a playgroup were observed in two situations: (1) a GROUP situation in which at least four of the boys were present and (2) a DYAD situation in which only two boys were present. Both types of observations were made at 16, 19, and…