MAc: ancova_to_d1 – R documentation

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MAc

ancova_to_d1

ANCOVA F-statistic to d

Description

Converts an ANCOVA F-statistic to d (standardized mean difference)

Usage

ancova_to_d1(m.1.adj, m.2.adj, sd.adj, n.1, n.2, R, q)

Arguments

`m.1.adj`	Adjusted mean of treatment group from ANCOVA.
`m.2.adj`	Adjusted mean of comparison group from ANCOVA.
`sd.adj`	Adjusted standard deviation.
`n.1`	Treatment group sample size.
`n.2`	Comparison group sample size.
`R`	Covariate outcome correlation or multiple correlation.
`q`	Number of covariates.

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.