Conversion from R-squared to Cohen's f

Helper function to convert between Cohen's f and R-squared.

Usage

rsq.to.f(r.squared.full, r.squared.reduced = 0, verbose = 0)

Arguments

r.squared.full: R-squared for the full model.
r.squared.reduced: R-squared for the reduced model.
verbose: 1 by default (returns results), if 0 no output is printed on the console.

Value

f.squared: Cohen's f-squared.
f: Cohen's f.
r.squared.full: R-squared for the full model.
r.squared.reduced: R-squared for the reduced model.

References

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

Selya, A. S., Rose, J. S., Dierker, L. C., Hedeker, D., & Mermelstein, R. J. (2012). A practical guide to calculating Cohen's f2, a measure of local effect size, from PROC MIXED. Frontiers in Psychology, 3, Article 111. https://doi.org/10.3389/fpsyg.2012.00111

Examples


  rsq.to.f(r.squared.full = 0.02) # small
  rsq.to.f(r.squared.full = 0.13) # medium
  rsq.to.f(r.squared.full = 0.26) # large