All children are oppositional from time to time, particularly when tired, hungry, stressed or upset.
They may argue, talk back, disobey, and defy parents, teachers, and other adults. Oppositional behavior is often a normal part of development for two to three year olds and early adolescents. However, openly uncooperative and hostile behavior becomes a serious concern when it is so frequent and consistent that it stands out when compared with other children of the same age and developmental level and when it affects the child's social, family, and academic life. The symptoms are usually seen in multiple settings, but may be more noticeable at home or at school. The causes of ODD are unknown, but many parents report that their child with ODD was more rigid and demanding than the child's siblings from an early age.