Now researchers at Tulane University provide the strongest evidence yet against the use of spanking: of the nearly 2,500 youngsters in the study, those who were spanked more frequently at age 3 were more likely to be aggressive by age 5. The research supports earlier work on the pitfalls of corporal punishment, including a study by Duke University researchers that revealed that infants who were spanked at 12 months scored lower on cognitive tests at age 3.
Here’s the study:
Taylor CA, Manganello JA, Lee SJ, Rice JC. Mothers’ Spanking of 3-Year-Old Children and Subsequent Risk of Children’s Aggressive Behavior. PEDIATRICS (doi:10.1542/peds.2009-2678). Published online April 12, 2010
Here’s the earlier study by Duke University researchers that was mentioned:
Berlin LJ, Ispa JM, Fine MA, Malone PS, Brooks-Gunn J, Brady-Smith C, Ayoub C, Bai Y. Correlates and consequences of spanking and verbal punishment for low-income white, african american, and mexican american toddlers. Child Dev. 2009 Sep-Oct;80(5):1403-20.