Eliminates the small upward bias of d to provide an unbiased estimate of the population effect size parameter (g). This procedure will compute g for a single value of d.
d_to_g(d, var.d, n.1, n.2)
Standardized mean difference statistic (d has a slight bias).
Variance of d.
Sample size of treatment group.
Sample size of comparison group.
Unbiased Standardized mean difference statistic.
Variance of g.
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.