HedgesOlkin85 | R Documentation |
Effects of open education on attitude toward school and on reading achievement reported by Hedges and Olkin (1985).
data(HedgesOlkin85)
The variables are:
Study number
Standardized mean difference on attitude
Standardized mean difference on achievement
Sampling variance of the effect size of attitude
Sampling covariance between the effect sizes
Sampling variance of the effect size of achievement
Hedges, L. V., & Olkin, I. (1985). Statistical methods for meta-analysis. Orlando, FL: Academic Press.
Cheung, M. W.-L. (2010). Fixed-effects meta-analyses as multiple-group structural equation models. Structural Equation Modeling, 17, 481-509.
data(HedgesOlkin85)
## Fixed-effects meta-analysis
summary( meta(y=cbind(d_att, d_ach),
v=cbind(var_att, cov_att_ach, var_ach),
data=HedgesOlkin85,
RE.constraints=matrix(0, nrow=2, ncol=2)) )
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