Health Belief Model
The health belief model assumes that a person will adopt appropriate health behaviors if they feel the consequences are severe and feel personally vulnerable. A person’s ability to adopt the change will depend on the relative balance of barriers to implementation versus the benefits of change. This “decision balance” construct has been a common thread among many behavioral theories.
Model originated in the 1950’s (Rosenstock) when the public health service started moving from treatment towards prevention. The model suggests that for an individual to change behavior they would have to feel personally susceptible to the disease and believe it to be sever and believe that taking action would be worthwhile (benefits > costs)
While the model has provided some useful constructs, it has proven to be more valuable in understanding the cessation of negative behaviors (smoking or drinking) rather than the adoption of positive behaviors (exercise, healthy diet)