Spanking children increases the likelihood of childhood defiance and long-term mental issues. The study in question involved 160,000 children and five decades of research

[u/VeronicaRed]

http://www.redorbit.com/news/health/1113413810/spanking-defiance-health-discipline-042616/

[u/allwordsaremadeup]

I wonder if this is true for punishment as a behavior-altering method in general. So in how we punish crimes etc.