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Peer reviewed
Direct linkLeggett-James, Mary Page; Laursen, Brett – Journal of Early Adolescence, 2023
Children and adolescents spend considerable time online. The current study investigated moderators of short-term longitudinal associations from social media use to changes in body satisfaction and physical activity. Participants (144 girls, 152 boys) were third-sixth grade students (ages 8-13) attending public schools in Florida (USA).…
Descriptors: Social Media, Physical Activity Level, Self Concept, Elementary School Students
Hedges, Larry V.; Hedberg, E. C. – Evaluation Review, 2013
Background: Cluster-randomized experiments that assign intact groups such as schools or school districts to treatment conditions are increasingly common in educational research. Such experiments are inherently multilevel designs whose sensitivity (statistical power and precision of estimates) depends on the variance decomposition across levels.…
Descriptors: Correlation, Multivariate Analysis, Educational Experiments, Statistical Analysis
Toby, Megan; Ma, Boya; Jaciw, Andrew; Cabalo, Jessica – Empirical Education Inc., 2008
PCI Education sought scientifically based evidence on the effectiveness of the "PCI Reading Program--Level One" for students with severe disabilities. During the 2007-2008 academic year. Empirical Education conducted a randomized control trial (RCT) in two Florida districts, Brevard and Miami-Dade County Public Schools. For this…
Descriptors: Reading Programs, Disabilities, Urban Schools, Public Schools
