TY  - GEN
A1  - Brunner, Martin
A1  - Keller, Ulrich
A1  - Wenger, Marina
A1  - Fischbach, Antoine
A1  - Lüdtke, Oliver
T1  - Between-school variation in students' achievement, motivation, affect, and learning strategies
BT  - results from 81 countries for planning group-randomized trials in education
T2  - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
N2  - To plan group-randomized trials where treatment conditions are assigned to schools, researchers need design parameters that provide information about between-school differences in outcomes as well as the amount of variance that can be explained by covariates at the student (L1) and school (L2) levels. Most previous research has offered these parameters for U.S. samples and for achievement as the outcome. This paper and the online supplementary materials provide design parameters for 81 countries in three broad outcome categories (achievement, affect and motivation, and learning strategies) for domain-general and domain-specific (mathematics, reading, and science) measures. Sociodemographic characteristics were used as covariates. Data from representative samples of 15-year-old students stemmed from five cycles of the Programme for International Student Assessment (PISA; total number of students/schools: 1,905,147/70,098). Between-school differences as well as the amount of variance explained at L1 and L2 varied widely across countries and educational outcomes, demonstrating the limited generalizability of design parameters across these dimensions. The use of the design parameters to plan group-randomized trials is illustrated.
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 465 
KW  - student achievement
KW  - motivation
KW  - affect
KW  - learning styles
KW  - intraclass correlation
KW  - large-scale assessment
KW  - multilevel models
KW  - design parameters
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-412662
IS  - 465
ER  -