> that doesn't seem like enough to study it as the cause of anything Unless I'm mistaken, their measure is basically Cohen's d, and 0.8 is indeed considered a

> that doesn't seem like enough to study it as the cause of anything Unless I'm mistaken, their measure is basically Cohen's d, and 0.8 is indeed considered a large effect in the social sciences (look at the table in [1]). [1] https://en.wikipedia.org/wiki/Effect_size#Cohen's_d https://en.wikipedia.org/wiki/Effect_size#Cohen's_d