Asking kids to remember how often they were punished is not feasible and this group should know better. It does seem clear to me that this group has an agenda, to disprove the studies (many of which are also suspect) that say corporal punishment actually has adverse consequences. Asking the parents has its flaws to too but it would be far more reliable than asking the kids.

And your comment in response to me above about it "being amazing what kids can remember" is not true. Kids simply do not have the ability to form accurate long term memories before three to three and a half years old. Kids are also notorious for novelization of events into theories about what occurred before they are teens/young adults. That is well documented in Cognitive Psychology.

The study is bunk and the idiots who put it together should be taken to task by serious scientists everywhere for their folly.