UNDATED (WKOW) -- Parents who spank their children may be doing more harm than good.
A new study shows spanking may increase aggressive behavior in young kids.
Researchers with the American Academy of Pediatrics say kids who were spanked frequently at age three were more likely to have more aggressive behaviors by age five.
The group also looked into parent's stress level, alcohol use and history of depression as part of the study.
The researchers say they oppose spanking.
Studies show most parents approve of it and use it as a way to discipline their children.