A qualitative exploratory study of substance abuse prevention outcomes in a heterogeneous prevention system

The prevention of abuse of alcohol and other drugs is a concern for parents, policy-makers, educators, and social service professionals. Prevention programs are sponsored by many different types of social and educational agencies using a variety of intervention strategies. This article reports a study of a sample of such programs in the state of Nevada. The overall prevention system in the state espouses a "risk and resiliency" approach to prevention. Focus group methodology was used to study perception of outcomes of these programs from the viewpoints of various program stakeholders (youth participating in the programs, parents of participants and program staff). Analysis of the qualitative data yielded findings about potential outcomes as well as implicit program theories. Implications for future planning efforts as well as further evaluation efforts are discussed.     

Social Competence with Peers in Third Grade: Associations with Earlier Peer Experiences in Childcare1

The early developmental antecedents of individual differences in children's social functioning with peers in third grade were examined using longitudinal data from the large‐scale National Institute of Child Health and Human Development (NICHD) study of early child care. In a sample of 1,364 children, with family and child factors controlled, the frequency of positive and negative peer interactions in childcare between 24 and 54 months and the number of hours spent in childcare peer groups of different sizes (alone, dyad, small, medium, large) predicted third graders' peer competence at three levels of analysis: individual social skills, dyadic friendships, and peer‐group acceptance. Children who had more positive experiences with peers in childcare had better social and communicative skills with peers in third grade, were more sociable and co‐operative and less aggressive, had more close friends, and were more accepted and popular. Children with more frequent negative experiences with peers in childcare were more aggressive in third grade, had lower social and communicative skills, and reported having fewer friends. When children spent more time in small‐sized peer groups in childcare (four or fewer children at 24 months of age up to seven or fewer at 54 months), they were more sociable and co‐operative in third grade, but their teachers rated them as more aggressive, suggesting that such children may be more socially outgoing and active both positively and negatively. Like those who spent more time in small peer groups, children who spent more hours in medium‐sized groups received higher ratings for peer aggression by their third‐grade teachers. Children who spent more time with one other child in childcare or in small peer groups had fewer classroom friends in third grade as reported by the teacher but not according to maternal report or self‐report. There were no significant associations between the amount of time children spent in large childcare‐based peer groups and third‐grade peer social competence.     

Relational Aggression in Middle Childhood: Predictors and Adolescent Outcomes

This study examined gender differences in the level and developmental course of relational aggression in middle childhood, as well as early predictors and outcomes of relational aggression, after controlling for concurrent physical aggression. Relational (RAgg) and Physical aggression (PAgg) scores for 558 boys and 545 girls at the ages of eight to 11 in the NICHD Study of Early Child Care and Youth Development (SECCYD) were created by combining the highest rating for each item across mother and teacher reports. Longitudinal analyses were conducted using latent curve models of RAgg with PAgg as a time‐varying covariate, with all parameters allowed to vary by gender. Boys and girls had different growth parameters of RAgg. Girls' RAgg intercept was higher, and the slope was not different from zero; boys' RAgg intercept was lower, and the slope declined. Mother–child conflict in early childhood predicted RAgg intercept for both boys and girls, but maternal harsh control and sensitivity were also uniquely predictive for girls whereas center care was uniquely predictive for boys. RAgg intercept predicted adolescent self‐reports of depression for girls and delinquency and risk‐taking for both boys and girls; the magnitude of the association with risk taking was significantly greater for boys.     

A Convolution Estimator for the Density of Nonlinear Regression Observations

Abstract. The problem of estimating an unknown density function has been widely studied. In this article, we present a convolution estimator for the density of the responses in a nonlinear heterogenous regression model. The rate of convergence for the mean square error of the convolution estimator is of order n ^?1 under certain regularity conditions. This is faster than the rate for the kernel density method. We derive explicit expressions for the asymptotic variance and the bias of the new estimator, and further a data‐driven bandwidth selector is proposed. We conduct simulation experiments to check the finite sample properties, and the convolution estimator performs substantially better than the kernel density estimator for well‐behaved noise densities.     

Family–Peer Linkages: The Mediational Role of Attentional Processes

The goal of this study was to examine the role of attention regulation as a mediator between parent–child relationships and peer social skills. Using the National Institute of Child Health and Human Development (NICHD) Study of Early Child Care and Youth Development data set, mother–child and father–child relationships measured at 54 months and grade 1 predicted peer social skills at first and third grades. Attentional control processes, especially ability to sustain attention and ratings of attention problems, served as mediators between parent–child relationships and peer outcomes. The implications of these processes for theories of family-peer relationships are noted.     

A critical survey on the status of multiple criteria decision making theory and practice

This paper seeks to review and to contrast the main streams of thought in Multiple Criteria Decision Making (MCDM) theory and practice, without attempting to review all MCDM methods in detail. The main purpose is to identify pitfalls in the usage of various approaches, and to suggest approaches which are most robustly and effectively useable, especially by the non-expert in MCDM methodology. Problem areas in MCDM still requiring further research are also discussed.     

Revision of Ladino and Maya census populations of Guatemala, 1950 and 1964

This article examines the Guatemalan census enumeration for 1950 and 1964 and the vital registration from 1945 to 1969. The examination reveals an inconsistency in the ethnic reporting of Ladino and Maya between the two systems. The evidence indicates census misclassification of the Maya population. An adjustment procedure is presented to revise the Ladino and Mayan populations for the two census years.