A 13-year-old boy presents to the PMHNP accompanied by his mother, who complains of a change in behavior for the past 2 months. The mother says her son frequently loses his temper, is easily angered, is resentful, and is spiteful toward her. This behavior started approximately 4 weeks after she and the boy's father separated and the father moved out of the home. Which of the following helps the PMHNP to rule out oppositional defiant disorder (ODD)?