I come from a family of four boys who were routinely spanked, hit, smacked, etc. Was it effective punishment? Well, if you consider the fact that it continued on and on, I would have to say no. I have three boys and have never laid a hand on one. In fact, when little, on the very rare occasion I raised my voice they would instantly burst into tears. ALL punitive measures wear out over time, no matter how harsh. Contrary to many here, I believe that children can be reasoned with, especially when one appeals to their natural sense of empathy. Maybe God has just blessed me with good children, probably so.
There is a huge difference between discipline and abuse. They should not be confused.
http://www.freerepublic.com/focus/news/1764946/posts?page=57#57