MAc: r_from_d – R documentation

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r_from_d

Correlation from Mean Difference

Description

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

Usage

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.

Value

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.