Addresses the use of data sources and multivariate data analysis methods for modeling naturally occurring data. Two studies in this special section deal with longitudinal perspectives on drug use and emotional adjustment and an application of log-linear model to examine the stress-buffering function of alcohol. (LLL)

This progress report provides evidence for persistent influence of Kids Voting USA (KVUSA), an interactive civic curriculum taught during election campaigns. The entire research project consists of multiple waves of student and parent interviews, covering a three-year period. Respondents were recruited from families in Arizona, Colorado, and…

In order to determine whether expenditures for mental health could be reduced and quality improved, Congress mandated that the Department of Defense conduct a demonstration project utilizing a wraparound mental health service system for child and adolescent military dependents. A longitudinal quasiexperimental design was used to evaluate the…

The authors conduct an evaluation of a middle school-based treatment program for youth with ADHD during early stages of treatment development. The studies focus on interpreting outcome trends in preliminary data and identifying assessment issues that will be important to consider when conducting a clinical trial. Parent reports indicate that the…

The purpose of this research was to ascertain if there were any significant differences in the ability to read logos and to make the transition to reading logos in manuscript forms of kindergarten children who received direct instruction with environmental print, those who received indirect instruction, and those who received no instruction with…

Prior studies of juvenile drug courts have been constrained by small samples, inadequate comparison groups, or limited outcome measures. The authors report on a 3-year evaluation that examines the impact of juvenile drug court participation on recidivism and drug use. A quasi-experimental design is used to compare juveniles assigned to drug court…

Purpose: This study examined the short- and long-term effects of Adult Day Services Plus (ADS Plus), a low-cost care management intervention designed to enhance family caregiver well-being, increase service utilization, and decrease nursing home placement of impaired older adults enrolled in adult day care. Design and Methods: We used a…

The purpose of this study was to compare the results of an analysis of covariance design to a method developed by the authors called within-class regression. Application of this statistical method can be to any quasiexperimental design with a large number of groups. A test of statistical significance to use with the within-class regression…

A sample of 51 fourth graders' perceptions of the quality of their school life, including satisfaction with school, commitment to their classwork, and attitudes toward teachers was assessed at the beginning and end of the school year, as were beliefs concerning responsibility for successful, unsuccessful, and overall academic achievements. Results…

A solution to the problem of specification error due to excluded variables in statistical models of treatment effects in nonrandomized (nonequivalent) control group designs is presented. It involves longitudinal observation with at least two pretests. A maximum likelihood estimation program such as LISREL may provide reasonable estimates of…

Estimates of program effects from a compensatory preschool intervention were investigated using econometric simultaneous modeling, latent variable structured modeling, and ordinary least squares regression. Data for 806 black children indicated that different quasi-experimental estimation methods that attempt to control for selection bias can…

Whether methadone maintenance treatment demonstrates cumulative (rehabilitative) or stabilizing effects on behavior of narcotics addicts over multiple treatment episodes was studied involving 993 addicts in a quasi-experimental design. Observed behavioral changes and longitudinal self-reports indicate stabilizing, but not cumulative, effects. (SLD)

The continued and increasing use of online training raises the question of whether the most effective training methods applied in live instruction will carry over to different online environments in the long run. Behavior Modeling (BM) approach--teaching through demonstration--has been proven as the most effective approach in a face-to-face (F2F)…

This report offers a number of specific teaching techniques that research suggests will help 4th- to 12th-grade students in this nation's schools. The report focuses on all students, not just those who display writing difficulties, although this latter group is deservedly the focus of much attention. The premise of this report is that all students…

The central purpose of the present study was to evaluate several statistical techniques (analysis of variance (ANOVA) on raw gains, standardized ANOVA, standard analysis of covariance (ANCOVA), and z-score ANOVA) under various quasi-experimental conditions (three levels of reliability, three levels of sample size, three levels of gain, and the…