t_to_d: t-test Value to Standardized Mean Difference (d)

In MAd: Meta-Analysis with Mean Differences

t-test Value to Standardized Mean Difference (d)

Description

Converts a t-test value reported in the primary study to a standardized mean difference (d).

Usage

t_to_d(t, n.1, n.2)

Arguments

t	t-test value reported in primary study.
n.1	Sample size of treatment group.
n.2	Sample size of comparison group.

Value

d	Standardized mean difference (d).
var_d	Variance of d.

Author(s)

AC Del Re & William T. Hoyt

Maintainer: AC Del Re [e-mail]

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, 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_d1, r_from_t

MAd documentation built on Aug. 7, 2022, 1:05 a.m.