cohens_d_: Cohen's d

In dgromer/psymisc: Miscellaneous functions for psychologists

Description

Calculate Cohens'd from different statistics (see Details).

Usage

cohens_d_(m1 = NULL, m2 = NULL, sd1 = NULL, sd2 = NULL, n1 = NULL,
  n2 = NULL, t = NULL, n = NULL, paired = FALSE, corr = c("none",
  "hedges_g", "glass_delta"))

Arguments

m1	numeric, mean of the first group
m2	numeric, mean of the second group
sd1	numeric, standard deviation of the first group
sd2	numeric, standard deviation of the second group
n1	numeric, size of the first group
n2	numeric, size of the second group
t	numeric, t-test statistic
n	numeric, total sample size
paired	logical indicating whether to calculate Cohen's for independent samples or one sample (FALSE, default) or for dependent samples (TRUE).
corr	character specifying the correction applied to calculation of the effect size: "none" (default) returns Cohen's d, "hedges_g" applies Hedges correction and "glass_delta" calculates Glass' Δ (uses the standard deviation of the second group).

Details

The following combinations of statistics are possible:

• m1, m2, sd1, sd2, n1 and n2

• t, n1 and n2

• t and n

References

Lakens, D. (2013). Calculating and reporting effect sizes to facilitate cumulative science: a practical primer for t-tests and ANOVAs. Frontiers in Psychology, 4, 863. doi:10.3389/fpsyg.2013.00863

dgromer/psymisc documentation built on May 15, 2019, 7:22 a.m.