Have Your Children Had Their Anti-Smoking Shots?

In the early 1960s, social psychologist William McGuire published some classic papers showing that it is surprisingly easy to change people's attitudes about things that we all wholeheartedly accept as true. For example, for speakers armed with a little knowledge of persuasion, it is remarkably easy to convince almost anyone that brushing one's teeth is not such a great idea. McGuire's insight into this curious phenomenon was that it is easy to change people's minds about things that they have always taken for granted precisely because most people have little if any practice resisting attacks on attitudes that no one ever questions.

Taking this logic a little further, McGuire asked if it might be possible to train people to resist attacks on their beliefs by giving them practice at resisting arguments that they could easily refute. Specifically, McGuire drew an analogy between biological resistance to disease and psychological resistance to persuasion. Biological inoculation works by exposing people to a weakened version of an attacking agent such as a virus. People's bodies produce antibodies that make them immune to the attacking agent, and when a full-blown version of the agent hits later in life, people win the biological battle against the full-blown disease. Would giving people a little practice fending off a weak attack on their attitudes make it easier for people to resist stronger attacks on their attitudes that come along later? The answer turns out to be yes. McGuire coined the phrase attitude inoculation to refer to the process of resisting strong persuasive arguments by getting practice fighting off weaker versions of the same arguments.