Attachment behavior, toy preference, style of play, and activity level were recorded in 17 sets of opposite sex twins observed in a playrrom setting with their mothers. (ST)

Familiarity of the setting, the mother's presence, sex of the stranger, and the distance separating the infant and the stranger were varied to examine the expression of stranger fear in 32 infants from 6 to 11 months of age. (Author/JMB)

The vocal distress of 10-month-old male and female infants was manipulated by placing the infants alone either with or without toys. The results demonstrate that separation distress is not an automatic response of infants and that maternal responses to separation depend on the infant's sex. (Author/JMB)

Children of 18 months classified as secure or insecure/avoidant by means of the Ainsworth Strange Situation were observed at home and in a playgroup. Teachers and observers rated girls classified as insecure/avoidant as being more difficult to deal with and having more difficulty with peers than girls rated as securely attached. (PCB)

Pooled sibling attachment data to compare attachment relationships to mothers for 138 sibling pairs. Found that sibling relationships were significantly concordant when classified as secure/nonsecure but not when further subcategorized. Maternal insensitivity to both siblings was associated with concordance of sibling nonsecurity. Same gender…

Twenty 18-month-olds were observed with their mothers and 20 with their fathers in laboratory free-play, departure, and separation situations. Findings were analyzed in terms of the differential roles of mothers and fathers, the development of sex differences, and determinants of separation distress. (JMB)

The relation between resumption of full-time employment by mothers of infants, and subsequent infant-mother and infant-father attachments, was examined. No relation emerged between maternal work status and the quality of infants' attachments to their mothers. (PCB)

Attempted to replicate findings of a previous study which found that mother-toddler interaction during problem solving was related to the child's prior attachment security. Examined the relationship between problem-solving interactions on the one hand, and mother-child interactions at home and infant temperament on the other. (PCB)

Social behaviors of 10- and 12-month-old infants were studied as a function of experimental context (home and laboratory) and experimental history (home rearing and day care). Results suggested that the experimental context influenced infant social behaviors. No differences attributable to rearing condition as a main effect were found. (Author/SB)

A total of 113 children were seen at one and six years of age in order to examine the relationship between the quality of the early attachment relationship and later psychopathology. Results from the Achenbach and Edelbrock Child Behavior Profile (a measure of psychopathology at six years) indicated different outcomes for male and female children.…

Examined continuity and discontinuity in maternal sensitivity of 135 disadvantaged mothers and their first-born children from 6 and 24 months to 42 months. Results indicate that sources of stress originating from the child or environment result in decreased sensitivity over time, whereas sources of support increase sensitivity.(RJC)

Assessed parent-child interaction in 2-parent families with 12- and 18-month-old infants through questionnaires, interviews, family observations, and the Ainsworth Strange Situation procedure. Found no effect of family stress and marital adjustment on infants' attachment classification. Parents of 12 month olds reported greater marital adjustment…

The attachment behavior of 35 white, middle-class 3 1/2- to 4-year-olds who had experienced different rearing histories was observed through a series of standardized episodes involving separations and reunions with the mother and a stranger. (Author/JMB)

Insecurely attached boys were less liked by peers and teachers; were perceived as more aggressive by classmates; and were rated by teachers as less competent and as having more behavior problems than were secure boys. No such association emerged for girls. Participants were 89 children assessed before and after they entered first grade and their…