interpret_cohens_g function

Interpret Cohen's g

interpret_cohens_g(g, rules = "cohen1988", ...)

Arguments

• g: Value or vector of effect size values.
• rules: Can be "cohen1988" (default) or a custom set of rules().
• ...: Not directly used.

Note

"Since g is so transparently clear a unit, it is expected that workers in any given substantive area of the behavioral sciences will very frequently be able to set relevant [effect size] values without the proposed conventions, or set up conventions of their own which are suited to their area of inquiry." - Cohen, 1988, page 147.

Rules

Rules apply to equally to positive and negative g (i.e., they are given as absolute values).

• Cohen (1988) ("cohen1988"; default)

  • d \< 0.05 - Very small
  • 0.05 \<= d \< 0.15 - Small
  • 0.15 \<= d \< 0.25 - Medium
  • d \>= 0.25 - Large

Examples

interpret_cohens_g(.02)
interpret_cohens_g(c(.3, .15))

References

• Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd Ed.). New York: Routledge.