(2017-10-27, 09:19 PM)Laird Wrote: Fair enough, Chris. I think that's a justifiable view, although I'm willing to extend Linda the benefit of the doubt and grant that she's being honest when she says she did mean that power decreased even though she only mentioned effect size decreasing (because that would be the case if the number of trials remained unchanged, which is what she claims her statement assumed).
The trouble is that would imply she thought it would be appropriate to test a weak effect by using the same number of trials as for a strong effect. She knows better than that.