Eta squared is R-squared (in Anova, we think of eta-squared, in
regression, R-squared, but as Cohen wrote, they're the same thing).
Eta squared (like R-squared) is used for all the variables in the
model, partial eta-squared is used for one variable. If you only have
one variable, they're the same.
2009/12/15 <[log in to unmask]>:
> I'm hoping someone may be help me. Does anybody know Cohen's standards for
> interpreting effect sizes? Do these differ for eta squared and partial eta
> squared? Also when would you use eta squared and partial eta squared?
> Best wishes
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