Here is a question for the child rearing experts.
What do you do with a 5 year old son who hits his little sister and kicks his mother in the shins?
Well that's easy, you chuck him in the shower and hose him down with cold water blasts until he apologises :Eek:
Deprivation is a poor behaviour modifier, the subject soon learns to not care about the item they are being deprived from, and they don't really link deprivation to bad behavior.
Fear is a very strong behaviour modifier, which is why spankings initially work, but they have some side effects depending on how the spanking is done, it can undermine trust and instil the wrong fear (fear of you)
Rationalization of behavior is very difficult for kids under 7.
It does start early, but your child has to view you as an authority, someone who guides them, who they can trust, and who they believe there will be a consequence for not meeting your expectations.
If you fail to do that early on, you've set the path yourself.
How do you set your self as an authority, early on its with tone of voice and facial expressions, even babies know a disapproving tone of voice.
A little further on, it's with tone of voice, body language and action.
A bit further on is making it real through stories, scenarios and discussion.
By the time they are entering their teens they'll be in good shape.
Because after they are in their teens you will have little control of them.
Start early or wage an uphlil battle.