@futurebird @darnell From my perspective, the problem with corporeal punishment is not related to whether it is effective or not. Even if it were shown to be the most effective method, it cannot escape a simple fact:
Parents are angry when they a beating their kids. It is nearly impossible not to be. So, whether we wnat to or not we end up teaching a kid to associate anger with violent response.
When you add in the fact that punishment is positively reinforcing for the person doing the punishment under all circumstances (research: Prospect Theory), the situation becomes worse.
We gotta find another way.