Disruptive behavior disorders are among the easiest to identify of all coexisting conditions because they involve behaviors that are readily seen such as temper tantrums, physical aggression such as attacking other children, excessive argumentativeness, stealing, and other forms of defiance or resistance to authority. (healthychildren.org)
ODD is characterized by argumentativeness, noncompliance, and irritability, which can be found in early childhood (Holmes et al., 2001). (personalityresearch.org)