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From ABC News:

Spanking toddlers makes for more aggressive kindergartners, according to a new study from Tulane University in New Orleans.

While organizations like the American Academy of Pediatrics and the Center for Effective Discipline staunchly advocate against corporal punishment, many parents continue to turn to the rod when disciplining their children.

In a 2005 online poll, 72 percent of adults reported that it was “OK to spank a child.” Various studies in recent years found the prevalence of corporal punishment varied widely, from 35 percent of parents to 90 percent, authors of the Tulane study note.

In the new study, published Monday in the journal Pediatrics, researchers found that of 2,500 mothers surveyed across the country, 46 percent reported no spanking in the last month, 28 percent said they spanked one to two times, and 26 percent reported spanking more than twice.

Three-year-old children of mothers who used spanking more frequently were significantly more likely to have aggressive kids later on down the road, the Tulane researchers found.

Even when controlling for other factors that affect child aggression by age five, such as parental neglect, maternal depression and stress, and the child’s aggressive tendencies as a toddler, researchers found that maternal aggression begets childhood aggression. Toddlers who are spanked were more likely to grow into kindergarteners that bully, hit, and were destructive and disobedient.

While several studies have found a correlation between physical punishment and childhood aggression, by controlling for confounding variables, the study’s methods provide “very significant” results and offer strong evidence for a causal link between the two, says Jay Reeve, chief executive officer at Apalachee Center, Inc., a family-targeted mental health center in Tallahassee , Fla.

These findings offer empirical evidence of what many psychologists already suspect, notes Edward Christophersen, clinical pediatric psychologist at Children’s Mercy Hospital and Clinics in Kansas City , Mo.

“Children imitate behavior that their parents model for them. If both parents use spanking as a means of controlling their children, then their children are much more likely to use physical force with playmates and siblings.”

Read the full story here.

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