I think so much depends on the child, the age, what you are trying to motivate them to do. I read somewhere that external motivators are ok for things that become matter of habit like potty training, rewarding for not sucking thumb...
I'm wondering if the same motivator can be great for one kid and detrimental for another, depending on personality.
Artana - I'll have to chew on the allowance program. Currently my boys get an allowance, they negotiated contracts w/ DH (how often to get paid, what to get paid for) and if they don't live up to their contract, they don't get paid. In your system, they get paid regardless of their behaviour but can earn extra money or lose money based on their behaviour.
