MAc: mean_to_d – R documentation

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mean_to_d

Means to Standardized Mean Difference

Description

Converts raw mean scores reported in the primary study to a standardized mean difference (d).

Usage

mean_to_d(m.1, m.2, sd.1, sd.2, n.1, n.2)

Arguments

`m.1`	Mean of group one.
`m.2`	Mean of group two.
`sd.1`	Standard deviation of group one.
`sd.2`	Standard deviation of group two.
`n.1`	Sample size of group one.
`n.2`	Sample size of group two.

Value

`d`	Standardized mean difference (d).
`var.d`	Variance of d.

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.