Dear, Welcome to HCM We understand your concerns I went through your details. Sometimes it s difficult to recognize the difference between a strong-willed or emotional child and one with oppositional defiant disorder. It s normal to exhibit oppositional behavior at certain stages of a child s development. I think this is the stage the child goes through at his age of 11. There are certain therapeutic guidelines given by American Psychiatric Association. According to those criteria, the child is assessed psychologically by a clinical psychologist or psychiatrist. If the child is diagnosed Oppositional Defiant Disorder (ODD), the child will be treated with Parent training, Parent-child interaction therapy, Cognitive problem-solving training etc. Medicines are used for impulse control and anger and aggression. Please review this web link for clinical psychologists near Pasadena. https://www.google.co.in/#q=Clinical+psychologist+Pasadena+California If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute detail possible. Hope this answers your query. Further clarifications are welcome. Good luck. Happy New Year. Take care.