when developing tailored interventions, the Center for Health Communications Research immerses itself in research to gain a thorough knowledge of the intervention topic. By understanding both the subject area and the theoretical underpinnings of successful behavior change, an outline for the intervention can then begin to take shape. As program development continues, individually tailored messages are formed from this groundwork into powerful health education messages. Listed below are a few of the major health behavior theories the Center uses to develop its interventions.