Convert Cohen's d to a correlation

Uses \(r = d / \sqrt{d^2 + 4}\).

Usage

d_to_cor(d)

Arguments

d

Cohen's d.

Value

Correlation coefficient.

References

Schmidt, F. L., Hunter, J. E., & Pearlman, K. (1982). Assessing the economic impact of personnel programs on workforce productivity. Personnel Psychology, 35, 333-347.

Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Erlbaum.

Examples

# Literature: Cohen (1988); Schmidt, Hunter, and Pearlman (1982).
d_to_cor(.50)
#> [1] 0.2425356