Correlation from Mean Difference II
Converts d (mean difference) reported in primary study to r (correlation coefficient) where sample size of the treatment group is not equal to the sample size of the comparison group (see section 12.5.4, Borenstein, 2009; pp. 234).
r_from_d1(d, n.1, n.2, var.d)
d |
Mean difference statistic (d) reported in primary study. |
n.1 |
sample size of group one reported in primary study. |
n.2 |
sample size of group two reported in primary study. |
var.d |
variance of d reported in primary study. |
Computes a correlation coefficient (r).
AC Del Re & William T. Hoyt
Maintainer: AC Del Re acdelre@gmail.com
Borenstein (2009). Effect sizes for continuous data. In H. Cooper, L. V. Hedges, & J. C. Valentine (Eds.), The handbook of research synthesis and meta analysis (pp. 279-293). New York: Russell Sage Foundation.
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