partial eta squared

There was a question about the difference between eta squared and partial eta squared. For a one way ANOVA, they are the same because SS(tot) = SS(effect) + SS(error). However, as analyses get more complicated, this won't always be the case. In these cases, partial eta squared involves partialling out (removing) the other SS terms besides SS(effect).

If all that was confusing, just know that in this class, we will mostly only be concerned with partial eta squared.