So combining two biased samples balances out? Or is it more testing self perception? E.g. do you think of yourself as X not whether you are objectively X. Probably thinking about this question in detail ruins its usefulness as a text question anyway....
Offhand I don’t entirely know, but the tests do work so your comparison issues can’t be serious. If they’ve been normed for your group, perhaps that screens off the worst of the issues.
So combining two biased samples balances out? Or is it more testing self perception? E.g. do you think of yourself as X not whether you are objectively X. Probably thinking about this question in detail ruins its usefulness as a text question anyway....
Offhand I don’t entirely know, but the tests do work so your comparison issues can’t be serious. If they’ve been normed for your group, perhaps that screens off the worst of the issues.