A clustered randomized design was used in which 28 inclusive preschool classrooms were randomly assigned to receive 2 years of training and coaching to fidelity in the LEAP (Learning Experiences and Alternative Program for Preschoolers and Their Parents) preschool model, and 28 inclusive classes were assigned to receive intervention manuals only.…

This study examined whether peer groups can indirectly affect children's academic development in sixth grade (ages 11 to 13) by influencing their engagement in the classroom. From the entire cohort of 366 sixth graders in a town, 87% provided information at the beginning and end of the school year. Peer groups were assessed using Socio-Cognitive…

The present study analyzed the long-term effects of perceived friend use and perceived peer use on adolescents' own cigarette, alcohol and marijuana use as a series of parallel growth curves that were estimated in two developmental pieces, representing middle and high school (N = 1,040). Data were drawn from a large drug abuse prevention trial,…

From a self-determination theory perspective, this study tries to investigate how perceived autonomy support, perceived relatedness and competence affect high school students' intrinsic motivations (enjoyment and curiosity) to use the Internet, and the related outcomes of the motivation. Surveys are distributed to seven junior and ten senior high…

Problematic drinking in college students is a serious public health problem. Although parental influence wanes during the college years, research suggests that parental behaviors in high school, including monitoring, alcohol-specific control (i.e., rules or communication), and problematic modeling of drinking, continue to predict their children's…

The purpose of this study was to examine group dynamics of educational leadership students in cohorts and make comparisons with the group dynamics characteristics of non-cohort students. Cohorts have emerged as dynamic and adaptive entities with attendant group dynamic processes that shape collective learning and action. Cohort (n=42) and…

This study investigated cultural identity and peer influence on tobacco, alcohol, and cannabis use in a culturally diverse sample of Northern Australian adolescents. Middle school students (n = 274) completed the Multigroup Ethnic Identity Measure (MEIM) and measures of their own and perceived friends' substance use. Higher scores on the full…

The academic performance of urban African American students continues to be a major concern. Academic achievement has been the main avenue to upward social mobility for African Americans. This study assesses the effect of attitudes, behavior, peers, and family on the academic performance of African American students living in urban public housing…

Objective: To test and compare 2 predictive models of weapon carrying in youth (n=308) recruited from 4 drop-in centers in San Diego and Imperial counties. Methods: Both models were based on the Behavioral Ecological Model (BEM). Results: The first and second models significantly explained 39% and 53% of the variance in weapon carrying,…

Few studies of inhalant use have examined a large number of predictors at the individual level, including risk and protective factors and delinquent behavior, while also taking into account contextual variables (such as school size and poverty rates). This exploratory study uses 8th grade data from a large-scale survey of students in Kentucky to…

Almost every institution of higher education advertises its ability to "produce" or "train" leaders for the community and world. Indeed, most institutions, if asked, would freely report that leadership development is a large part of their overall mission of educating students. The purpose of this research is to determine…

Little is known about trauma-related symptoms among runaway adolescents. Precocious departure from familial homes often exposes youth to traumatic victimization. This study examined the extent to which runaway adolescents present trauma symptomotology and assessed factors that predict trauma symptoms. Participants (N = 350) were 12-18 years of age…

This study extends prior examination of adolescent violence etiology, drawing on an ethnically diverse, community accessed, yet emotionally vulnerable sample (N = 849) of adolescents at-risk for school dropout. A balanced risk and protective factor framework captured theorized dimensions of strain, coping, and support resources. We tested the…

For the four leading causes of death in the United States (heart disease, cancer, stroke and chronic respiratory disease), tobacco use is a common risk factor. Tobacco use is responsible for almost 450,000 deaths per year and impacts the health of every member of our society. Tobacco is a gateway drug for substance abuse. That role is critical to…

Using longitudinal administrative data from a large elite research university, this paper analyzes the role of peers and grades in determining major persistence in the life and physical sciences. In the physical sciences, analyses using within-course, across-time variation show that ex-ante measures of peer quality in a student's introductory…