The aim of this study was to assess individual and social antecedents of attachment security and attachment disorganization of infants as assessed by the Strange Situation. Observations from two longitudinal studies, with a parallel assessment schedule yielding a total sample of 88 infant-mother pairs, formed the database of the study. Newborn behavioral organization, in terms of orienting ability and regulation of state, and maternal sensitivity assessed several times during the infant's first year were used to predict the security of infant-mother attachment and the status of disorganization of anachment behavior strategies at the age of 12 months. Whereas attachment security was significantly associated only with maternal sensitivity. the status of disorganization was only predicted by newborn behavioral organization. The findings are discussed with respect to specific assumptions about individual and social conbibution to the development of infant-mother attachment on the background of maternal attachment representation.
RIbUMJ? Le but de cette etude ttait d'tvaluer les antecedents individuels et sociaux dc la s6curid de I'attachcment et de la dtsorganisation de I'attachement de nounissons, Cvalute par la situation inhabituelle.
Des observations a partir de deux etudes longitudindes avec un emploi du temps d'tvaluation parall&le donnant un eChantillon total de 88 paires nounisson-mtre constitua la base de doqntes de I'ttude. L'organisation