Recent methods have sought to improve precision in randomized controlled trials (RCTs) by utilizing data from large observational datasets for covariate adjustment. For example, consider an RCT aimed at evaluating a new algebra curriculum, in which a few dozen schools are randomly assigned to treatment (new curriculum) or control (standard…

Background: We examined the longitudinal trajectory of substance use (binge drinking, marijuana use, and cocaine use) in relation to self-esteem from adolescence to young adulthood. Methods: Generalized estimating equation models were fit using SAS to investigate changes in the relation between self-esteem and each substance use (binge drinking,…

This study investigated the important predictors of depression levels of middle school students' according to their recreational sport participation, gender, age and their socioeconomic status. The data of the study was collected from middle schools in the city center of Kutahya, 342 (113 woman, 198 man) students randomly recruited and voluntarily…

The aim of the present study was to examine whether class-level characteristics, such as class size and gender ratio, could contribute to explaining different levels of bullying, victimization, and perception of defending between classes. Seven-hundred-and-sixty-three students (M[subscript age] = 12.96, SD = 1.22; 54.4% boys) from 42 Portuguese…

The purpose of this study was to explore relations between students' prior grades in mathematics, achievement goal orientations in math classes, math anxiety, and students coping strategies in math classes. Three achievement goal orientations (mastery goals, performance-approach goals, and performance-avoidance goals) and two coping strategies…

This study aims to determine students' characteristics that predict their academic success. The study group consisted of 4,229 students studying at middle schools in Burdur. The data were collected using a questionnaire in the 2014-2015 academic year and analyzed using CHAID (Chi-squared Automatic Interaction Detection) analysis, a type of…

We identified developmental trajectories of academic burnout related to psychological maladjustments (i.e., compulsion and depression) in 7th and 8th grade Korean adolescents. This is vital because it facilitates early awareness of burnout trends and related psychological maladjustments, which might influence mental health problems, thus promoting…

In this prospective study, we recruited a sample of Belgian adolescents (N = 886) to investigate to what extent perceived teachers' motivating style relates to quality of motivation in the beginning of the school year and, in turn, changes in study effort and procrastination by the end of the school year. After controlling for initial levels of…

This study focused on the joint effects of teachers and peer groups as predictors of change in students' engagement during the first year of middle school, when the importance of peer relationships normatively increases and the quality of teacher-student relationships typically declines. To explore cumulative and contextualized joint effects, the…

This study deepens the field's understanding about factors that contribute to positive social engagement between students without disabilities and their peers with mild disabilities in general education classrooms. A sample of 68 seventh grade students with and without disabilities was drawn from general education classrooms in a suburban, Midwest…

The current study examined statistically significant differences between struggling and adequate readers using a multicomponent model of reading comprehension in 796 sixth through eighth graders, with a primary focus on word reading and vocabulary. Path analyses and Wald tests were used to investigate the direct and indirect relations of word…

Purpose: The purpose of this paper is to develop a quantitative model of problem solving performance of students in the computer-based mathematics learning environment. Design/methodology/approach: Regularized logistic regression was used to create a quantitative model of problem solving performance of students that predicts whether students can…

The authors examined 1,781 rural students' reading motivation and behavior across the transition from middle to high school. Using expectancy-value theory, they investigated how motivational variables predicted changes in reading behavior and achievement across the transition in terms of their expectancies, values, and out-of-school reading…

This report presents further validation evidence for the Student Subjective Wellbeing Questionnaire (SSWQ). Analyses conducted with a sample of urban middle-school students (Grades 5-8, N = 335) targeted two limitations from previous validation studies: the lack of convergent validity evidence linking responses to the SSWQ with actual school…

This study investigated extra curricular activities and their influence on the academic achievement in reading fluency and reading comprehension for the middle school special education student. The purpose of this study was to explain and clarify relationships among the variables providing insight to the significance of the special education…