How often do doctors say something like this to patients? “It’s really important for you to do this; if you don’t you might … have a stroke, go blind, lose a leg, die or (insert a scary outcome here).” There are no solid data to answer this question, though patients report that conversations containing such direct threats are common in clinical encounters. The more important question is, do scare tactics work?
Fear-based messages in clinical encounters
Health communication experts call these types of messages fear-based appeals. Fear appeals create an emotional reaction to some “threat” of disease, disability or death, which in turn, is thought to motivate behavior change. Doctors may use fear-based messages when counseling patients about chronic disease self-management or prevention, especially when faced with a patient we believe to be unmotivated or non-adherent. In such situations, using fear as a tool is appealing because it is easy, doesn’t take much time and we know intuitively that fear can be a powerful motivator. Yet despite decades of research on the subject, there is no consensus on whether or how fear can be used effectively to motivate long-term behavior change.
Research supporting the effectiveness of fear appeals is generally from public health campaigns, where frightening facts or images can quickly capture the audience’s attention. This makes sense when a message sender is competing for audience attention among many billboards, advertisements and other messages. But it rarely makes sense when a doctor is alone in an exam room with a patient. For many patients, the 15 minutes they have with their doctor will be the 15 most important minutes of their day.

