Oppositional Defiant Disorder (ODD) is thought to be caused by a combination of biological, psychological, and social factors. ODD tends to occur in families with a history of Attention Deficit Hyperactivity Disorder (ADHD), substance use disorders, or mood disorders such as depression or bipolar disorder.
Brain imaging studies have also suggested that children with ODD may have subtle differences in the part of the brain responsible for reasoning, judgment and impulse control. Psychological studies have also demonstrated that children who display aggressive behavior have trouble accurately identifying and interpreting social cues from peers. Specifically, aggressive children tend to see hostile intent in neutral situations.
They also generate fewer solutions to problems and expect to be rewarded for their aggressive responses. Lack of structure or parental supervision, inconsistent discipline practices, and exposure to abuse or community violence have also been identified as factors which may contribute to the development of ODD.