STORY HIGHLIGHTS
Study: Spanking at age 1 predicts aggressive behavior problems at age 2
Spanking also linked to lower scores on a mental development test at age 3
Experts say parents should explore other methods of disciplining children
Spanking reinforces negative memories in the child's mind
" 'We're talking about infants and toddlers, and I think that just, cognitively, they just don't understand enough about right or wrong or punishment to benefit from being spanked,' said Lisa Berlin, the study's lead author and research scientist at the Center for Child and Family Policy at Duke University. ... The best use of spanking, Larzelere said, is in children between the ages of 2 and 6 when milder discipline tactics, such as time out, fail."