r_from_d function

Correlation from Mean Difference

Converts d (mean difference) to r where n.tmt = n.comparison (see section 12.5.4, Borenstein, 2009; pp. 234).

r_from_d(d, var.d, a = 4)

Arguments

• d: Mean difference statistic (d) reported in primary study.
• var.d: Variance of d reported in primary study.
• a: Used to compute correlation. Default is 4.

Returns

Outputs a correlation coefficient (r).

Author(s)

AC Del Re & William T. Hoyt

Maintainer: AC Del Re acdelre@gmail.com

References

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.

See Also

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_d1, r_from_t