Sustained effects of high participation in an early intervention for low-birth-weight premature infants

Effects of high participation in the Infant Health and Development Program (IHDP), an 8-site randomized trial that targeted low-birth-weight (LBW) premature infants (N=1,082), were estimated. Children in the treatment group were offered high-quality center-based care in their 2nd and 3rd years of life (full-day care, 50 weeks per year). High-dosage effects were estimated with a new methodology that found a matched comparison group within the follow-up group for those with high participation rates; these estimates were compared with traditional intention-to-treat (ITT) estimates. At age 8, effects on the Wechsler Intelligence Scale for Children Full and Verbal scales for children who attended > 400 days ranged from 7 to 10 points. For the heavier LBW infants (2,001-2,500 g), the effects were about 14 points for > 400 days; for the lighter LBW infants (< or = 2,000 g), the effects were about 8 points. These effects were all substantially higher than corresponding ITT effects. Similar but smaller effects were found for children who attended > 350 days.     

Changes in neighborhood poverty from 1990 to 2000 and youth's problem behaviors

This study used data from the Project on Human Development in Chicago Neighborhoods, a multilevel, longitudinal study of children sampled from 80 diverse neighborhoods, to explore associations among changes in neighborhood poverty from 1990 to 2000 and changes in youth's internalizing problems and property and violent offenses over 6 years (N = 3,324; mean age across waves = 12.6 years). After accounting for a host of background characteristics and weighting for the propensity to stay in the original sampled neighborhood, results indicated that neighborhood poverty dynamics were unfavorably linked to boys' problem behaviors. In high-poverty (>30% in 1990) neighborhoods, decreasing poverty was associated with boys' greater internalizing problems and higher probability of increasing in violent behavior than stable neighborhood poverty. In moderate-poverty (20%-30% in 1990) neighborhoods, boys in neighborhoods that got poorer had more internalizing problems than boys in stably poor neighborhoods. Likewise, in low-poverty (<20% in 1990) neighborhoods, increasing poverty was associated with boys' higher probability of increasing in violent behavior than stable neighborhood poverty. Effect sizes were larger in high- and moderate-poverty neighborhoods than in low-poverty neighborhoods. This study complements the neighborhood mobility literature and has implications for interventions aimed at community revitalization.     

Anger and Children’s Socioemotional Development: Can Parenting Elicit a Positive Side to a Negative Emotion?

This study examined the role of anger in infancy and its interaction with maternal warmth in predicting children’s socioemotional development. Participants included a demographically diverse sample of 316 mothers and children from the Project on Human Development in Chicago Neighborhoods (PHDCN) study. Infants were followed across 3 waves of data collection from birth through 5?years of age. Mothers reported on infant anger when children were approximately 4?months of age. Maternal warmth was assessed via observation at both 4?months and 2?years. Children’s socioemotional outcomes were assessed at age 5, and included a direct assessment of delay of gratification and maternal reports of internalizing and externalizing behaviors. Anger in infancy significantly predicted higher levels of internalizing and externalizing behaviors at age 5. A main effect of anger on delay of gratification was not supported. However, anger in infancy moderated the association between maternal warmth and delay of gratification, such that only high-anger infants benefited from high maternal warmth. Similar interactive effects were not supported for problem behaviors. These results provide modest support for the differential susceptibility hypothesis, which proposes that highly reactive children are more susceptible to environmental risks and assets than other children. Specifically, findings suggest that although anger can increase children’s vulnerability to problem behaviors, it can also be a motivating factor for self-regulation in the presence of supportive parenting.     

Models of Development: Understanding Risk in Adolescence

In this paper, we review developmental models for understanding adolescence as they might be applied to emerging sexuality and the challenges and risks that may be associated with different sexual orientations and identities. Models have been identified as: cumulative events or simultaneous change, accentuation, or trajectory models. Inclusion of risk and protective factors and considering the extent of balance between these elements of an adolescent's life is also discussed in terms of predicting mental health outcomes. These models have been particularly useful in the study of the development of psychopathology and clearly relate to the broader issue of understanding suicide risk during adolescence.