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Wentzel, Kathryn R.; Jablansky, Sophie; Scalise, Nicole R. – Educational Psychology Review, 2018
Using meta-analytic techniques, we examined systematically the evidence linking friendship to academically related outcomes, asking: To what extent is friendship related to academic performance and to academically related cognitive skills? Based on 22 studies that yielded 81 effect sizes and 28 independent samples, we examined relations between…
Descriptors: Meta Analysis, Friendship, Correlation, Academic Achievement
Soares, Denise A.; Harrison, Judith R.; Vannest, Kimberly J.; McClelland, Susan S. – School Psychology Review, 2016
Recent meta-analyses of the effectiveness of token economies (TEs) report insufficient quality in the research or mixed effects in the results. This study examines the contemporary (post-Public Law 94-142) peer-reviewed published single-case research evaluating the effectiveness of TEs. The results are stratified across quality of demonstrated…
Descriptors: Effect Size, Token Economy, Meta Analysis, Nonparametric Statistics
Wang, Shin-Yi; Parrila, Rauno; Cui, Ying – Journal of Autism and Developmental Disorders, 2013
This meta-analysis used hierarchical linear modeling to examine 115 single-case studies with 343 participants that examined the effectiveness of social skills interventions for individuals with autism spectrum disorder (ASD). The average effect size of the included studies was 1.40 (SD = 0.43, 95% CL = 1.32-1.48, N = 115). In the further, several…
Descriptors: Meta Analysis, Hierarchical Linear Modeling, Case Studies, Pervasive Developmental Disorders

Hyde, Janet Shibley – Developmental Psychology, 1984
Provides a comprehensive meta-analysis of gender differences in aggression; offers estimates of the magnitude of differences; provides a developmental analysis of effects for all ages for which data are available; and includes a total of 143 studies. Basic techniques of meta-analysis are presented and then applied to analyze studies of gender…
Descriptors: Age Differences, Aggression, Correlation, Developmental Stages