The typical parent, when whacking a misbehaving child, doesn't pause to wonder: "What does science have to say about the efficacy of corporal punishment?" If they are thinking anything at all, it's: "Here comes justice!" And while the typical parent may not know or care, the science on corporal punishment of kids is pretty clear. Despite the rise of the timeout and other nonphysical forms of punishment, most American parents hit, pinch, shake, or otherwise lay violent hands on their youngsters: 63 percent of parents physically discipline their 1- to 2-year-olds, and 85 percent of adolescents have been physically punished by their parents. Parents cite children's aggression and failure to comply with a request as the most common reasons for hitting them.
--Alan E. Kazdin, "Spare the Rod," Slate.com
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