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This longitudinal study examined links between disorganization and atypical maternal behavior at 12 and 24 months in 71 adolescent mother-child dyads. Organized attachment and maternal not disrupted behavior were more stable than disorganization and disrupted behavior, respectively. At both ages, disorganization and maternal disrupted behavior were significantly correlated. Change in atypical maternal behavior predicted change in disorganization across time. The results provide substantial support for extant theories linking anomalous maternal behavior to the development of disorganized attachment. The Interesting-but-Scary paradigm, introduced in this study, promises to be a useful tool for assessing attachment and maternal behavior in toddlerhood.

Naturalistic assessment of maternal and infant interactive behavior using q-sorts has typically focused on rationally derived variables, such as maternal sensitivity and infant security. In the current study, behavior profiles characteristic of groups of young and adult mothers and their infants were derived empirically through q-factor analysis of the Maternal Behavior Q-sort (Version 3.0) and the Attachment Q-sort (Version 3.0). A three-factor solution best described the behavior profiles characteristic of young mothers. The identified factors were labeled: 'ignoring/neglecting versus interacting', 'accepting versus hostile/rejecting', and 'interfering'. The behavior of adult mothers was less variable and was described with only one factor, which corresponded to the 'accepting versus hostile/rejecting' factor. The factor solutions for infants of young and adult mothers were similar, with four identified factors, or behavioral profiles, discriminating between groups of infants with similar patterns of behavior: 'secure with mother', 'prefers visitor', 'socially withdrawn' and 'demanding with mother'. Infants of young and adult mothers differed with regard to their mean values on the first two identified factors. Results provide support for the relevance of rationally derived domains and criterion sorts in populations of both adult and young mothers, and suggest ways of progressing beyond the currently used, rationally derived variables in assessments of maternal and infant behavior in high- and low-risk populations.

The role of maternal sensitivity as a mediator accounting for the robust association between maternal attachment representations and the quality of the infant-mother attachment relationship was examined. Sixty mother-infant dyads were observed at home and in the Strange Situation at 13 months, and mothers participated in the Adult Attachment Interview (AAI) within the next 6 months. A strong association was found between AAI and Strange Situation classifications, and autonomous mothers were more sensitive at home than were nonautonomous mothers. Mothers in secure relationships were more sensitive at home than mothers in nonsecure relationships. Likewise, infants in secure relationships were more secure as assessed by the Waters' Attachment Q sort than infants in nonsecure relationships. A test of the mediational model revealed that maternal sensitivity accounted for 17% of the relation between AAI and Strange Situation classifications.

41 preterm infants and 38 full-term infants and their mothers were observed at home at 8 and 12 months of age and in the Strange Situation at 18 months in order to compare expressions of attachment relationships in these 2 settings. There was 84% concordance in the distinctions between secure and nonsecure classifications of the mother-infant relationship made at home at 12 months and in the Strange Situation. Classifications of avoidant relationships also displayed high concordance, but only 6 of the 15 dyads classified at home as ambivalent were classified in the same way in the Strange Situation. Mothers in secure relationships as assessed in the Strange Situation were rated as more sensitive at both 8 and 12 months than mothers in either avoidant or ambivalent relationships, whereas the sensitivity of mothers in these two nonsecure relationships did not differ significantly. Infants in secure relationships in the Strange Situation were characterized by more effective secure base behavior and more affective sharing and enjoyment of physical contact, and they were less fussy or difficult during the 12-month home observations.

40 mothers and their 12-month-old infants were observed twice at home by 2 observers for 2 hours. After the second visit, the observers described the infant using the Waters Attachment Behavior Q-sort and the mother's interactive behavior with the Maternal Behavior Q-sort developed by the present authors and Ainsworth's rating scales. Maternal sensitivity was unrelated to maternal age, income, or SES, but correlated positively with maternal education. Mothers of more difficult children were less sensitive. A strong relation was found between infant attachment and maternal sensitivity as measured by the Maternal Behavior Q-sort and by the Ainsworth scales. Using the Q-sort procedure, mothers of more secure infants were more frequently characterized as noticing their babies' signals and using these signals to guide their behavior; they also were more knowledgeable about their infant and appeared to enjoy them more than mothers of less secure infants.

48 12-month-old infants and their mothers were videotaped in the Ainsworth Strange Situation. Each infant-mother dyad was also filmed for 3 min while the mother completed a questionnaire and the infant was left to explore the room devoid of toys, a situation in which maternal compliance with the request to complete the questionnaire was expected to compete with attentional demands made on her by the infant. Infant-mother attachment was classified as secure, anxious-avoidant, or anxious-resistant on the basis of behavior in the Strange Situation. Assessment of maternal sensitivity during the questionnaire situation included behaviors classified as reflecting appropriate, insufficient, and intrusive responses to infant cues. 3 summary measures of maternal sensitivity, each of which distinguished between mothers of securely and anxiously attached infants in 1-way analysis of variance tests, were entered into a discriminant function analysis. Using the discriminant function coefficients for combining the maternal sensitivity scores, 94% of the infants were correctly classified as securely or anxiously attached on the basis of their mothers' behavior in the questionnaire situation.