In other cases, conduct disorder includes repeated truancy, vandalism, and serious physical aggression or assault against others by a gang, such as mugging, gang fighting, and beating. Children who become part of a gang usually have the skills for age-appropriate friendships. They are likely to show concern for the welfare of their friends or their own gang members and are unlikely to blame them or inform on them. In most cases, gang members have a history of adequate or even excessive conformity during early childhood that ended when the youngster became a member of the delinquent peer group, usually in preadolescence or during adolescence. Also present in the history in some evidence of early problem, such as marginal or poor school performance, mild behavior problem, anxiety, and depressive symptoms. Some family social or psychologic pathology in usually evident. Patterns of paternal discipline are rarely ideal and can very from harshness and excessive strictness to inconsistency or relative absence of supervision and control. The mother has often protected the child from the consequences of early mild misbehavior but does not seem to encourage delinquency actively. Delinquency, also called juvenile delinquency, is most often associated with conduct disorder but can also result from other psychologic or neurologic disorders.