The Extended Parallel
Process Model
• Two appraisal processes
• Threat Appraisal
• Efficacy Appraisal
• Three Outcomes
• No response with low perceived threat
• Acceptance when perceived threat and efficacy are high
• Rejection when perceived threat is high, but efficacy is low
• Example (seat belts)
Witte, et al. Effective Health Risk Messages. (2001)