10.1: Cognitive Dissonance Theory

Learning Objectives

1. Explain the theory of persuasion discussed in the text: cognitive dissonance theory.

Theories of Persuasion

Understanding how people are persuaded is very important to the discussion of public speaking. Thankfully, a number of researchers have created theories that help explain why people are persuaded. While there are numerous theories that help to explain persuasion, we are only going to examine one here: cognitive dissonance theory.

Cognitive Dissonance Theory

bruthanick – Smoking Kills Others – CC BY-NC-ND 2.0.

In 1957, Leon Festinger proposed another theory for understanding how persuasion functions: cognitive dissonance theory (Festinger, 1957). Cognitive dissonance is an aversive motivational state that occurs when an individual entertains two or more contradictory attitudes, values, beliefs, or behaviors simultaneously. For example, maybe you know you should be working on your speech, but you really want to go to a movie with a friend. In this case, practicing your speech and going to the movie are two cognitions that are inconsistent with one another. The goal of persuasion is to induce enough dissonance in listeners that they will change their attitudes, values, beliefs, or behaviors.

Frymier and Nadler noted that for cognitive dissonance to work effectively there are three necessary conditions: aversive consequences, freedom of choice, and insufficient external justification (Frymier & Nadler, 2007). First, for cognitive dissonance to work, there needs to be a strong enough aversive consequence, or punishment, for not changing one’s attitudes, values, beliefs, or behaviors. For example, maybe you’re giving a speech on why people need to eat more apples. If your aversive consequence for not eating apples is that your audience will not get enough fiber, most people will simply not be persuaded, because the punishment isn’t severe enough. Instead, for cognitive dissonance to work, the punishment associated with not eating apples needs to be significant enough to change behaviors. If you convince your audience that without enough fiber in their diets they are at higher risk for heart disease or colon cancer, they might fear the aversive consequences enough to change their behavior.

The second condition necessary for cognitive dissonance to work is that people must have a freedom of choice. If listeners feel they are being coerced into doing something, then dissonance will not be aroused. They may alter their behavior in the short term, but as soon as the coercion is gone, the original behavior will reemerge. It’s like the person who drives more slowly when a police officer is nearby but ignores speed limits once officers are no longer present. As a speaker, if you want to increase cognitive dissonance, you need to make sure that your audience doesn’t feel coerced or manipulated, but rather that they can clearly see that they have a choice of whether to be persuaded.

The final condition necessary for cognitive dissonance to work has to do with external and internal justifications. External justification refers to the process of identifying reasons outside of one’s own control to support one’s behavior, beliefs, and attitudes. Internal justification occurs when someone voluntarily changes a behavior, belief, or attitude to reduce cognitive dissonance. When it comes to creating change through persuasion, external justifications are less likely to result in change than internal justifications (Festinger & Carlsmith, 1959). Imagine that you’re giving a speech with the specific purpose of persuading college students to use condoms whenever they engage in sexual intercourse. Your audience analysis, in the form of an anonymous survey, indicates that a large percentage of your listeners do not consistently use condoms. Which would be the more persuasive argument: (a) “Failure to use condoms inevitably results in unintended pregnancy and sexually transmitted infections, including AIDS”—or (b) “If you think of yourself as a responsible adult, you’ll use condoms to protect yourself and your partner”? With the first argument, you have provided external justification for using condoms (i.e., terrible things will happen if you don’t use condoms). Listeners who reject this external justification (e.g., who don’t believe these dire consequences are inevitable) are unlikely to change their behavior. With the second argument, however, if your listeners think of themselves as responsible adults and they don’t consistently use condoms, the conflict between their self-image and their behavior will elicit cognitive dissonance. In order to reduce this cognitive dissonance, they are likely to seek internal justification for the view of themselves as responsible adults by changing their behavior (i.e., using condoms more consistently). In this case, according to cognitive dissonance theory, the second persuasive argument would be the one more likely to lead to a change in behavior.

Key Takeaways

• Cognitive dissonance theory reasons that people do not like holding to ideas in their heads that are contrary and will do what is necessary to get rid of the dissonance caused by the two contrary ideas. 

Exercises

1. Imagine you’re giving a speech to a group of college fraternity and sorority members about why hazing shouldn’t be tolerated. Explain the persuasive process using the theory of persuasion discussed in this chapter.

References

Festinger, L. (1957). A theory of cognitive dissonance. Evanston, IL: Row, Peterson, & Company.

Festinger, L., & Carlsmith, J. M. (1959). Cognitive consequences of forced compliance. Journal of Abnormal and Social Psychology, 58, 203–210.

Frankish, K. (1998). Virtual belief. In P. Carruthers & J. Boucher (Eds.), Language and thought (pp. 249–269). Cambridge, UK: Cambridge University Press.

Frymier, A. B., & Nadler, M. K. (2007). Persuasion: Integrating theory, research, and practice. Dubuque, IA: Kendall/Hunt.

Perloff, R. M. (2003). The dynamics of persuasion: Communication and attitudes in the 21st Century (2nd ed.). Mahwah, NJ: Lawrence Erlbaum, pp. 5–6.

Petty, R. E., & Cacioppo, J. T. (1986). The elaboration likelihood model of persuasion. Advances in Experimental Social Psychology, 19, 123–205.

Sherif, M., & Hovland, C. I. (1961). Social judgment: Assimilation and contrast effects in communication and attitude change. New Haven, CT: Yale University Press.