Two experiments were conducted to test effects of infants' ability to locomote on their social and exploratory behaviors. Results indicated that walker-assisted or independent locomotion afforded similar experiences within a standard environment but experiences quite different from those of the nonlocomoting infant. (Author/RH)

When not socially engaged, children showed a significantly greater percentage of reoriented attention during vocalizing than nonvocalizing periods. Findings confirm the existence of an attention/vocalization relation and are consonant with Greenfield's predictions about the nature of this relation. The relation held equally for prelinguistic and…

Results of two experiments indicate that dimensions of the social situation in which social behaviors are modeled influence eight-month-old children's tendency to imitate and their choice of recipients for their imitation. (Author/RH)

Previously published data on infants aged 12 and 13 months who were observed in the Strange Situation with their mothers and fathers were reanalyzed using a component process approach. (PCB)

Examines the extent to which an infant's social initiative resists or is modified by three variations in the behavior of adult responsiveness: repeated responses, varied responses, and eye aversion. (HOD)

Discusses observations of sets of infant twins, aged 6 to 24 months, as they interacted with one another and with an unfamiliar peer. Assesses quality of infant-mother attachment. Finds twins are more likely to react with one another than with a peer. Results are discussed in relation to early peer relationships and attachment. (Author/RWB)

Four studies involving 40 pigtail monkeys are described in which relatively short separation experiences in infancy were associated with evidence of persistent changes in social behavioral function (less sociability, fewer close friends) and immunological function (suppression of lymphocyte proliferation) up to 6 years later. (Author/JDD)