Oppositional Defiant Disorder typically affects kids between the ages of 6-12 and can be effectively treated through family-based psychotherapy. Disclaimer: This test is NOT a diagnostic test. A diagnosis can only be provided by a qualified healthcare professional. Please consult a physician or mental health professional if you are concerned about a child's mental health. Silva, R. R., Alpert, M., Pouget, E., Silva, V., Trosper, S., Reyes, K., & Dummit, S. (2005). A rating scale for disruptive behavior disorders, based on the DSM-IV item pool. Psychiatric Quarterly, 76(4), 327-339.