When a child or teen experiences problems it is important to understand him or her in the context of the whole family. It is also important to understand the family history and dynamics that influence and shape the child’s behavior and emotional development. Many things may affect the family such as loss or grief, divorce/separation, addiction, abuse, health problems, or chronic stress. Family therapy may include parent training and improving the parent-child relationships through play, games, or sharing feelings. When one person in the family system changes, it affects everyone else in the family. When dealing with oppositional defiant behaviors or hyperactive-impulsive behaviors, family therapy and parent training is the most effective way to establish love and authority though a cost/reward system.