Spanking is already associated with more aggression when a child gets older. Now, researchers at Columbia University found that spanking of pre-school children is linked to lower vocabulary scores.
Findings show children who were spanked as toddlers scored lower on word tests at age nine. In a study of almost 2,000 families across the US, they found that about half of the parents used spankings to discipline their toddlers. Checking back in when the children were 9, the kids who were spanked scored lower on word tests.