The present study tests two predictions stemming from the hypothesis that a source of difficulty with rational numbers is interference from whole number magnitude knowledge. First, inhibitory control should be an independent predictor of fraction understanding, even after controlling for working memory. Second, if the source of interference is…

Bullying occurs in all countries where it has been studied, causing negative effects on victims such as anxiety, low self-esteem and even depressive pictures that hinder their integration into the school environment. In Spain, one of the first studies to address peer abuse as violent behaviour in the school context was that of the Ombudsman in…

Individual written feedback in the form of teacher marking of student classwork is widely understood to benefit students, but remains under-researched. We analysed how 1736 student science activities within 82 seventh-grade classrooms from a representative sample of 57 primary schools in Buenos Aires, Argentina, were marked. Results indicated that…

Background: Previous research has examined associations between individual activity behaviors and academic achievement. Yet activity behaviors should be analyzed together because they are codependent parts of the 24-hour day. Aims: This study aims to explore the associations between all daily activity behaviors (sleep, sedentary time, light…

This study examined the development of social skills across five measurement points from 4th through 7th grade, and the influence of child gender and school-related factors on the level and growth of social skills, in a large sample of normally developing children in Norway (N = 2,076). On average, children's social skills scores increased…

The aim of this study was to analyze the importance of some physical fitness and motor skills for children between 11-13 years at elementary school. A total of 114 primary school children participated as volunteers with a means age of 10.80 ± 0,40 for 5th grade and 12.83 ± 0,38 for 7th grade. In this study, some motor tests were used to detect…

Threshold concepts are essential ideas about the natural world that present either a barrier or a gateway to a deep understanding of science. Weight, mass, and gravity are threshold concepts that underpin students' abilities to understand important ideas in all fields of science, embodied in the performance expectations in the Next Generation…

Purpose: The authors created a database of expository oral language samples with the aims of describing the nature of students' expository discourse and providing benchmark data for typically developing preteen and teenage students. Method: Using a favorite game or sport protocol, language samples were collected from 235 typically developing…

Examined the possibility that lonely preadolescents have problems with disclosure that are similar to those of lonely adults. Sixth and seventh graders were given a loneliness and social dissatisfaction scale and were observed in dyadic conversations with male and female peers. Some of the lonely subjects' problems with disclosure were similar to…

A total of 1,771 children completed self-report questionnaires during sixth and seventh grade. Early adolescents who believed their parents asserted and did not relax their power and restrictiveness scored higher than other adolescents on items that measured an extreme peer orientation. (MDM)

Temperament and objective and subjective measures of academic competence were interrelated in order to test two alternative models: (1) a direct effects model stressing intraorganismic, noncontextually mediated links; and (2) a developmental contextual model emphasizing social interactional processes between students and teachers. Data from the…

Data from 877 3rd, 7th, and 11th graders substantiated the multidimensionality of academic self-concept, as based on the Shavelson model, but yielded no support for increasing differentiation across age. Data also determined minor deterioration of hierarchical structure for early and late adolescents but no progressive pattern of weakening across…

Data from a longitudinal study of adolescent development of approximately 2,300 sixth and seventh graders (the Michigan Study of Adolescent Life Transitions) provide a basis for the hypothesis that optimal developmental outcomes should result from an environment that gradually reduces adult control as the child's desire for autonomy increases.…

This study represents the first to empirically validate the structure of social self-concept (SC) as proposed by the Shavelson model. For each of three age groups--preadolescents (252 3rd graders), early adolescents (290 7th graders), and late adolescents (335 11th graders)--analyses of covariance structures were used to test: (1) that social SC…

Results of an investigation of the construct validity of measurements of social and academic competencies of 175 3rd graders, 193 7th graders, and 159 11th graders made by the students themselves, teachers, parents, and peers suggest that researchers should consider making greater use of parent ratings for elementary school students. (SLD)