Effect sizes from studies on the effects of SAT coaching, reported in Kalaian and Raudenbush (1996)
A data frame with 67 rows and 11 variables:
Year of publication
Character string indicating whether effect size corresponds to outcome on verbal (SATV) or math (SATM) test
Effect size estimate (Standardized mean difference)
Variance of effect size estimate
Sample size in treatment condition
Sample size in control condition
Character string indicating whether study design used a matched, non-equivalent, or randomized control group
Hours of coaching
Indicator variable for Educational Testing Service
Indicator variable for homework
Kalaian, H. A. & Raudenbush, S. W. (1996). A multivariate mixed linear model for meta-analysis. Psychological Methods, 1(3), 227-235. doi:10.1037/1082-989X.1.3.227
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