Individuals struggling with oppositional defiant disorder display an irritable or angry mood, engage in argumentative, defiant, or vindictive behaviour for a prolonged period of time. Some examples of behaviours individuals with this disorder may be struggling with are losing their temper frequently, arguing with authority figures, breaking rules, not listening to authority figures, annoying others on purpose, and not taking responsibility for their actions.

Individuals struggling with this disorder may notice that their life is negatively impacted in many areas including school, home, and recreation. This is a diagnosis that can be applied to both adults and children.

Treatment for oppositional defiant disorder for children includes family therapy and parental training.