Final answer:
Social Learning Theory is the concept incorporated into SAPR training to understand the social contexts under which sexual assault behaviors are learned and thus can be prevented.
Step-by-step explanation:
The theory that must be incorporated into all Sexual Assault Prevention and Response (SAPR) training is the Social Learning Theory. Based on the work of Edwin Sutherland, his Differential Association theory particularly suggests that criminal behavior is learned through association with others who already engage in such behavior.
It emphasizes how individuals may learn to consider deviant behavior acceptable when influential persons in their lives, such as friends or family members, demonstrate and endorse those behaviors. This is deemed essential to understanding the social context within which such behaviors are learned and can be prevented, making it integral to SAPR training.