# cohens_d_: Cohen's d In apa: Format Outputs of Statistical Tests According to APA Guidelines

## Description

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

## Usage

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```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

apa documentation built on April 21, 2020, 5:05 p.m.