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)

Results showed no evidence that intercorrelations of patterns of attachment behavior were influenced by methodological considerations such as length of observation, setting of observation, or the number of behaviors monitored. Further, there was no evidence of sex differences in the pattern of correlations. (JMB)

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)

This experiment tested the theoretical predictions concerning the patterns of visual fixation to representations of familiar and unfamiliar persons during the second quarter of the first year of life. Subjects were twelve 4-month-old and twelve 6-month-old infants. (Author/SB)

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)

Thirty-eight mothers completed questionnaires that assessed their attachment to their infant, stress level, and infant's temperament. Mothers were also observed interacting with their infant at six weeks and again at nine months. Found that stressed mothers felt less attached to their infant at six months than nonstressed mothers, and mothers of…

Analyzed attachment relationships of 22 maltreated and 21 nonmaltreated infants of 12 months. Findings indicated a preponderance of disorganized/disoriented (Type D) attachments in the maltreatment group, with boys more likely than girls to be Type D. (RJC)

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)

Examined the stability of infant-parent attachment security in samples of 90 infant-mother and 120 infant-father dyads who completed the Ainsworth and Wittig Strange Situation procedure at 6- to 7-month intervals. Significant stability was not discerned in attachment security, with rates of stability ranging from 46% to 55%. (MDM)

Mothers and fathers of 62 children were seen separately in the Strange Situation procedure, and their caregiving behaviors were separately assessed using several measures. Results revealed only one effect, that mothers of securely attached children were more responsive to their children than other mothers. (BC)

Explores the attachment relationship of fathers to their infant children. Highlights the ways fathers parent differently from mothers, and the positive effects on child outcomes of fathers' participation in caregiving. (HTH)

This paper presents results of the first part of a research program designed to test the hypothesis that an hour of extra contact between mother and infant beginning about one half hour after delivery would be associated with more secure attachment of an infant to its mother at one year. In the overall study extra contact infants were also…

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)