Symptoms of Conduct Disorder: If a child or adolescent is considered to have Conduct Disorder they must exhibit behaviors that are of a belligerent, destructive, threatening, physically cruel, deceitful, disobedient or dishonest nature.  This includes behaviors such as stealing, intentional injury and forced sexual activity.  Conduct behaviors must be repetitive and persistent, demonstrated within the last 6 to 12 months and cause impairment in social, academic or work settings. There are four categories of Conduct Disorder each with different behaviors.  A child or adolescent with ODD would also exhibit some or many of these behaviors.   Aggression to people or animals Bullies, threatens or intimidates Starts physical fights Has used a weapon Has been physically cruel to people and animals Has stolen while confronting a victim (e.g. mugging or armed robbery) Forced someone into sexual activity   Destruction of property Has intentionally started a fire to cause serious damage Has purposely destroyed others’ property   Deceitfulness or theft Has broken into houses, buildings or cars Lies to obtain goods, favors or avoids commitments Stolen items without confronting victims (e.g. shoplifting, not including breaking and entering)   Serious violation of rules Stays out of the home regardless of parental disapproval (before 13 years of age) Has run away from home Is often absent from school     Types of Conduct Disorder: Childhood-Onset Type Any of the diagnostic criterions of Conduct Disorder began before the age of 10. Adolescent-Onset Type This is marked by the absence of any Conduct Disorder characteristics before the age of 10.   There are also three distinguishable severities of Conduct Disorder, these are: Mild This form of Conduct Disorder is present if only the minimum symptoms are present and the conduct problems cause only minor harm to others. Moderate A moderate form of Conduct Disorder is when the conduct problems effect or harm others intermediately. Severe This is where the child demonstrates conduct behaviors that are excessive or cause significant harm to others.