There is an ongoing debate about the pros and cons of corporal punishment in raising children and adolescents. Researchers have found a link between spanking and IQ levels:
· Children who were spanked in childhood have lower IQs
· The more children were spanked, the slower the development of their mental ability and the lower their IQ level
· Countries in which spanking children was more common saw stronger links between corporal punishment and IQ
· The IQ of children 2–4 years old who were not spanked was 5 points higher when tested four years later than those who were spanked.
· Corporal punishment experienced into the teenage years may hamper brain development even more.