The AHDP's concept of the staffer serving as a friendly coach was influenced by reference group theory. The Friendly Coach. The role of the coach is to develop a system of progressive, systematic activities which insures the member's success in attaining an explicit or implicit goal. The staffer establishes that he or she is authoritative, has the member's best interest at heart, and gives contingent and general reinforcement. A second type is fashioned by people but the motivation to kill another is lacking.
Examples are accidents, drug abuse, environmental assaults, unemployment, etc.
Since HDs are caused by people are preventable. The prevention and eradication of HDs are considered by Leviton to be the primary health problem of our time. Thus friendships develop as stereotypes are reduced.