Testing a series of causal propositions relating time in child care to children's externalizing behavior.

Prior research has documented associations between hours in child care and children's externalizing behavior. A series of longitudinal analyses were conducted to address 5 propositions, each testing the hypothesis that child care hours causes externalizing behavior. Data from the National Institute of Child Health and Human Development Early Child Care Research Network (NICHD) Study of Early Child Care and Youth Development were used in this investigation because they include repeated measures of child care experiences, externalizing behavior, and family characteristics. There were 3 main findings. First, the evidence linking child care hours with externalizing behavior was equivocal in that results varied across model specifications. Second, the association between child care hours and externalizing behavior was not due to a child effect. Third, child care quality and proportion of time spent with a large group of peers moderated the effects of child care hours on externalizing behavior. The number of hours spent in child care was more strongly related to externalizing behavior when children were in low-quality child care and when children spent a greater proportion of time with a large group of peers. The magnitude of associations between child care hours and externalizing behavior was modest. Implications are that parents and policymakers must take into account that externalizing behavior is predicted from a constellation of variables in multiple contexts.

Testing a maternal attachment model of behavior problems in early childhood.

BACKGROUND: The purpose of the present study was to test a maternal attachment model of behavior problems in early childhood using phase I data from the NICHD Study of Early Child Care, a prospective study of 1,364 children from birth through sixth grade. METHODS: Mothers' and caregivers' ratings of children's internalizing and externalizing problems at age three were regressed separately on a set of fifteen predictors that included security and disorganization scores from 15, 24, and 36 months using hierarchical and logistical modeling. RESULTS: There were three main findings. First, Q-set mother-child attachment security, based on home observations at 24 months, provided the best evidence that attachment was associated with behavior problems, especially above-average levels of problems. Second, insecurity in the 36-month modified Strange Situation predicted mothers' and caregivers' ratings of internalizing problems for boys and girls as well as their ratings of externalizing problems for boys. Third, maternal depressive symptoms predicted mothers' ratings of internalizing and externalizing problems. CONCLUSIONS: There are meaningful associations between attachment insecurity and behavior problems as assessed not only by mothers but also by caregivers.