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Steenbergen-Hu, Saiying; Cooper, Harris – Journal of Educational Psychology, 2013
In this study, we meta-analyzed empirical research of the effectiveness of intelligent tutoring systems (ITS) on K-12 students' mathematical learning. A total of 26 reports containing 34 independent samples met study inclusion criteria. The reports appeared between 1997 and 2010. The majority of included studies compared the effectiveness of ITS…
Descriptors: Meta Analysis, Intelligent Tutoring Systems, Mathematics Instruction, Mathematics Achievement

Abrami, Philip C.; And Others – Journal of Educational Psychology, 1990
Primary research on student ratings of instruction is reviewed, and questions about the validity of such ratings as measures of teacher effectiveness are explored using nomological coding of 43 validity studies to examine causes of variability in coefficients of validity. Deficiencies of prior analyses and research needs are identified. (SLD)
Descriptors: Coding, College Faculty, College Students, Generalization