The facial expressions of twenty-eight 13-month-old middle-class children were videotaped during the 3-minute separation episode of the Ainsworth strange-situation procedure. Anger was the dominant negative emotion expressed by the majority of children; patterns of emotion expression varied with type of attachment; and the proportion of time anger…

Examined whether an infant's reaction to a stranger would be indirectly influenced by the infant observing a stranger-third party interaction. Subjects were 45 15-month-old infants. Results suggest indirect effects influence social interactions and show that significant others can play an important role in mediating these effects. (Author/RH)

When mothers of 12 infants 10 weeks of age displayed noncontingent, practiced facial and vocal expressions of joy, anger, and sadness, infants responded differently to each expression. Infants' matching responses to maternal affects were only part of complex but predictable behavioral patterns that indicate meaningful affect states and possibly…

The influence of negative affect on the retrieval of information from memory during infancy was investigated in two studies through the use of an operant conditioning paradigm. The procedure used, known as "mobile conjugate reinforcement," involves a free operant task in which an infant is reinforced for footkicking by the movement of an…

To test hypotheses concerning interactional histories associated with variation in quality of infant-mother attachment, data were gathered during naturalistic home observations of 60 infants 1, 3, and 9 months of age. Responses were elicited on the Ainsworth and Wittig strange situations. Results concerned mothers' relatively greater influence in…

Examines the nonverbal communication competence of 18- to 48-month-old Down Syndrome children. Results indicate that Downs children display strengths and weaknesses in nonverbal communication skills. Further, results suggest a deficit in expressive language is associated with a deficit in nonverbal requesting skill that had developed earlier among…

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)