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).
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.
AC Del Re & William T. Hoyt
Maintainer: AC Del Re acdelre@gmail.com
d_to_g, mean_to_d, mean_to_d2, t_to_d, f_to_d, p_to_d1, p_to_d2, ancova_to_d1, ancova_to_d2, tt.ancova_to_d, f.ancova_to_d, r_to_d, p.ancova_to_d1, p.ancova_to_d2, lor_to_d, prop_to_or, prop_to_d, r_from_chi, r_from_d, r_from_t