http://www.amazon.com/Kazdin-Method...mp;s=books&qid=1243365178&sr=8-2

Have you seen this? He was the head of the Yale Child Study center, and it's research-based, not opinion/ideology-based. he talks about how exactly rewards systems have to be set up to be successful in changing a child's behavior. He says people think they're doing rewards but often have the system set up to subtly undermine the goal. you may already be doing the most effective system possible, but it seems worth a check. He's v. good at validating parents' frustration while pointing toward effective measures. I found it extremely thought-provoking and to some extent behavior changing. (I lack time and energy to implement now so it's more changing my thought.) I wish the title didn't use defiant, b/c i think it would help anyone.