Oppositional Defiant Disorder (ODD) is a behavior disorder that affects children and adolescents.
Five to fifteen percent of all school-age children have Oppositional Defiant Disorder, which is similar to the better known Attention-Deficit Hyperactivity Disorder (ADHD) in that its symptoms mirror normal childhood behavior that become a problem of excess.
While ADHD is characterized by excess hyperactivity, impulsiveness or inattention, children afflicted with Oppositional Defiant Disorder are more likely to openly challenge adult authority figures. They may argue, talk back, disobey and defy teachers, parents and other adults.
Again, this behavior isn’t necessarily abnormal. Most children are oppositional from time to time, particularly when tired, hungry, upset or stressed. But children with oppositional defiant disorder manifest an ongoing pattern of misbehavior that seriously impedes their day to day functioning.
Most children suffering from Oppositional Defiant Disorder also have some other neuropsychiatric disorder. (The tendency for disorders in medicine to occur together is called comorbidity.)
Some research indicates that Oppositional Defiant Disorder is a precursor to other conduct and personality disorders.