Smacking Kids Lower their I.Q.

Recently the new research has found that smacking, or spanking, children can affect their intelligence. In addition to this, some experts say that being hit by parents is traumatic experience and such stresses affect brain badly.
I used to be spanked by my parents a lot as a punishment when I was a little, but I understood that that's because I did something wrong or misbehaved. I have never thought my experience as a traumatic experience, that's need to be done. Most important thing is that whether children understand their behaviors or attitudes were wrong.