good morning and first of all {{HUGS}}!!!
Out of 4 children, I have TWO that are extremely defiant...one is my 11 year old JD, that does indeed have bipolar disorder, and my one and only daughter Michaelah (whom my mother says is just "paying me back"...ha ha!!!)
I am trying to figure out HOW to say what I am going to try to say here, so bear with me and if you have any questions feel free to let me know!!!
First of all, in my most humble opinion...it is very easy to OVER discipline a defiant child. this is a very hard concept to try to explain online but I will do my best. A defiant child has an incessant need to "control" his/her environment...we learned that the extremely HARD way with our oldest. Of course there are things that they just can't have control of...rules are rules (ie--can't hit, spit, bite, etc)...but as a parent of a defiant child you need to learn one phrase in particular...CHOOSE YOUR BATTLES!!!!
If you constantly discipline (ie-time outs, losing priviledges,etc) everything you want to change about their behavior...the behavior WILL continue because of their NEED to control things...BUT, if you figure out some of the things you are having problems with that you can flex on and give them options that they CAN control...you will begin to see that they are much easier to control when you HAVE to. For example..if bathtime is one battle you have...tell them you HAVE to take a bath...would you like to NOW or in 30 mins? A big one with my son is homework. I remind him daily it HAS to be done...either do it NOW and say be able to go outside or do you homework in an hour with no privildges. Make sure they KNOW they are not only choosing their options, but they are choosing the result also! If they choose NOT to do either option, then they are personally choosing the discipline (time outs etc).
I hope that makes some sense. Of course, you have to do it where it is age appropriate. Like for my daughter an example would be you can pick up your toys now OR after this cartoon is over...but if you don't, then the TV goes OFF!!!
The key is to figure out WHAT you are willing to be flexible on and give them SOME control over their lives...in the end I promise you, their entire behavior pattern will change because you are not in constant struggle over "control"....
Gosh, I have read that several times...I hope it makes sense to you!!! Let me know if it doesn't and I will try to explain it another way...
I hope this helps!!!
hugs and brigthest blessings
H.