 Oppositional defiant disorder ( ODD ) and conduct disorder ( CD ) , which occur with ADHD in about 50 % and 20 % of cases respectively . They are characterized by antisocial behaviors such as stubbornness , aggression , frequent temper tantrums , deceitfulness , lying , and stealing . About half of those with hyperactivity and ODD or CD develop antisocial personality disorder in adulthood . Brain imaging supports that conduct disorder and ADHD are separate conditions . 
