Here's an interesting side to this. I'm sure most of you are familiar with the television show "Supernanny" with Jo Frost.
I've watched plenty of episodes and have seen the most out of control children - of all ages - you could possibly imagine. It's always the same: the parents' form of discipline is spanking and yelling, and it never works; hence, the call to the Supernanny.
Jo Frost has been a nanny for over 20 years and has come across every conceivable behavioral situation. AND NEVER, NOT ONCE, HAS SHE ENCOURAGED A PARENT TO SPANK as discipline.
Here's a great related article: