Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

listed in the DSM-IV-TR, an ongoing trend of behavior that comprises breaching the fundamental liberties of other people and disregarding cultural norms for optimal ages. Certain actions include arson, violence, telling lies, mistreatment of animals, running away, theft and burglary, a habit of being late, and fighting. This illness is differentiated from oppositional defiant disorder by the enhanced seriousness of the behaviors and their taking place separate of another occurrence.

CONDUCT DISORDER: "When Jeff was diagnosed with conduct disorder, he began to better understand his behavior over the past several years and sought to apologize to those who he had wronged or offended."

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