Oppositional Defiant Disorder (ODD)
At least 4 symptoms of angry/irritable mood, argumentative/defiant behavior, or vindictiveness occur with someone other than a sibling.
Timing requirement
Frequency + duration
≥6 months
Timing in context
For children under 5, behavior occurs on most days; at age 5 or older, at least weekly, unless severity/context indicates otherwise.
Sources and review
Last content review: August 21, 2026