Spanking is stupid

LA Times reports on a new study.

Being spanked as a child is linked to having a lower IQ, according to a study presented today at the International Conference on Violence, Abuse and Trauma in San Diego.

Straus studied 806 children ages 2 to 4 and 704 ages 5 to 9. Both groups were retested four years later. How often parents spanked influenced IQ score. "The more spanking, the slower the development of the child's mental ability," Straus said in a news release. "But even small amounts of spanking made a difference."

Straus and his colleagues looked at corporal punishment practices in 32 countries by surveying 17,404 university students. The analysis found a lower average IQ in nations in which spanking was more prevalent. The strongest link between corporal punishment and IQ was for those whose parents continued to use corporal punishment even when they were teenagers.

How would spanking impact intelligence? Straus suggests that the chronic stress created by regular spanking creates post-traumatic stress symptoms in children. PTSD is linked to lower IQ. Economic status also underlies both spanking practices and IQ, Straus said, a leading researcher on corporal punishment.