This study examined the diversity in feelings of loneliness among high-ability students. Individual differences (intelligence level, giftedness label, and personality) and differences in the social context (peer acceptance, peer rejection, victimization, and friendship quantity) of adolescents were considered as predictors of loneliness.…

The goal of this study was to explore longitudinal associations between preference for solitude (PFS) and depressive symptoms among early adolescents in mainland China, with a focus on separating between-person and within-person effects using a random intercept cross-lagged panel model (RI-CLPM). Participants were N = 1039 Chinese early…

Background: Phonological processing skills have been found to contribute to spelling development across different orthographies; however, less is known about the role of orthographic knowledge. This longitudinal study explores the contribution of phonological and orthographic knowledge to spelling development in a semi-transparent orthography…

This study evaluated the forecasting accuracy of trend estimation methods applied to time-series data from computer adaptive tests (CATs). Data were collected roughly once a month over the course of a school year. We evaluated the forecasting accuracy of two regression-based growth estimation methods (ordinary least squares and Theil-Sen). The…

A growing body of research demonstrates that school climate is associated with adolescent mental health. Much of the extant literature have focused on identifying risk factors for adverse mental health outcomes, whereas much less work has been done examining factors that are important to foster adolescents' strengths and thereby increase the…

Reading self-concept is an important predictor of reading comprehension and vice versa. However, the mechanisms that are at work in this relation have yet to be identified. In line with the self-enhancement approach, we propose that in the reading domain, amount of reading, book choice (text difficulty and book length), and intrinsic reading…

This study examined the temporal relation between self-competence and depressive symptoms in a large, diverse, U.S. community sample of 1,344 adolescents (51% female; [x-bar] [subscript age] = 12.73, SD = 0.69, range = 11-14 years). Surveys were administered to seventh- and eighth-grade students at participating high schools in the fall of 2016…

This study applies life course theory (Elder, 1998) to understand the effect of different mathematics course progressions throughout the high school transition period. The purpose of the study was two-fold: to investigate the effectiveness of two different high school's mathematics course progressions by examining mathematics achievement…

International research suggests that early mathematical competence predicts later mathematical achievement. In this article, we explore the relationship between mathematical competencies at 4-5 years, as measured by teacher ratings, and later results on Years 3, 5, 7 and 9 "National Assessment Program -- Literacy and Numeracy" (NAPLAN)…

Algebra I is a crucial course for middle and high school students for successful STEM related coursework. A key issue is whether students should take Algebra I in 8th versus 9th grade. Large-scale policy studies show conflicting results, and there are few (particularly longitudinal) individual difference studies. Here, 53 students were assessed in…

This study examines the power of cognitive and noncognitive variables to predict students' performance in algebra. We investigated students' prior year's assessment scores and demographic characteristics to predict eighth-grade algebra scores. Using California statewide assessment data, we explored predictive factors in three regression models.…

In the United States a "civic engagement gap" persists between low-income youth and their higher-income counterparts. To examine the developmental origins of civic engagement in a sample of U.S. children growing up in poverty, a conceptual model was tested employing the Early Childhood Longitudinal Study-Kindergarten Class (ECLS-K)…

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…

Background: Social justice orientation (SJO) is the motivation to promote justice and equity among all in society. Researchers argue that students of Color with high SJO can resist structural racism in their schools/society and have positive academic outcomes. Purpose: In the present study, a longitudinal model of cultural and environmental…

Background: We examined prevalence, incidence, and trajectory of obesity from kindergarten through grade 8 in one of the first states to implement annual surveillance. Methods: Participants included 16,414 children enrolled in kindergarten in Arkansas in 2004 with complete body mass index (BMI) measurements in kindergarten and eighth grade.…