t-test Value to Standardized Mean Difference (d)
Converts a t-test value reported in the primary study to a standardized mean difference (d).
t_to_d(t, n.1, n.2)
t: t-test value reported in primary study.n.1: Sample size of treatment group.n.2: Sample size of comparison group.d: Standardized mean difference (d).
var_d: Variance of d.
AC Del Re & William T. Hoyt
Maintainer: AC Del Re acdelre@gmail.com
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.
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