According to Alan Kazdin, there are three criteria that determines when you need to discipline a child. These would include deterioration in functioning (whether at school or home), a child not being manageable, and the last one is if the child is causing some sort of danger or harm to others or themselves (Speaking of Psychology: Disciplining children effectively). However, understanding when a child needs to be disciplined is not the part most parents have problems with. The problem for most lies in choosing the most effective way to alter a child 's unwanted behavior. With research now showing that moderate to severe spanking can cause mental, physical, and academic health problems, some parents are more confused than ever.…