Oppositional Defiant Disorder (ODD) is characterized by a persistent pattern of tantrums, arguing, and angry or disruptive behavior towards authority figures that disrupts the child's social, family, and academic life. Potential causes include a child's natural disposition, developmental delays, lack of supervision, inconsistent discipline, abuse or neglect, and imbalances in brain chemicals like serotonin. Treatments focus on individual and family therapy, parent-child interaction therapy, cognitive problem solving training, social skills training, and parent training.