What Is… Cognitive Dissonance

Insights into psychology: Cognitive dissonance

In this series, I dig a little deeper into the meaning of psychology-related terms. This week’s term is cognitive dissonance.

Cognitive dissonance occurs when we have two beliefs that conflict, or when our beliefs and actions don’t match, making us feel uncomfortable. The concept was originally described back in the 1950s by psychologist Leon Festinger. The degree of dissonance increases with the number of inconsistent cognitions and the importance of those cognitions. Cognitions that threaten core beliefs about ourselves are likely to cause significant dissonance.

Festinger identified three reasons why we might reject a new idea/belief that conflicts with our existing beliefs:

  • change might be difficult or involve loss
  • we like the present behaviour, even if it may carry future costs
  • change might not be possible

We naturally strive for consistency; it’s how we make sense of ourselves and our relationship with the world. When faced with inconsistency, we’re motivated to take steps to reduce the sense of dissonance. We can reduce dissonance by removing dissonant cognitions, adding new consonant (consistent) cognitions, or increasing the importance of consonant cognitions.

How we manage cognitive dissonance

To reduce that discomfort, we tend to reject, rationalize, or avoid information that highlights that dissonance. That can mean rejecting solid, accurate information because it weakens our position and gives us the inner squirmies.

In terms of COVID, people who are attached to their idea of freedom in non-masking may respond to information about the harm that COVID is doing by rationalizing that they’re unlikely to get COVID, that COVID is just a minor illness, or even that COVID isn’t actually real. This rationalization allows them to feel comfortable in hanging onto and demonstrating their belief that non-masking equals freedom.

Someone who smokes and knows that smoking can cause lung cancer and kill people may try to reduce that dissonance by quitting smoking, minimizing the likelihood that they will get cancer, or thinking about the positives that they believe they get from smoking.

You might be like me and care about animal welfare, but do your best to pretend that the meat that you like to eat doesn’t actually come from animals. I don’t have a problem with meat consumption per se, as it happens in the animal kingdom and I think it’s a natural thing; however, it does make me squirmy to think about the direct link between the cow going moo and the burger on my plate. I like to eat meat, so that cognitive dissonance-avoiding ostrich in the sand strategy works for me.

With something like climate change, we may agree that the environment is important. However, when we choose to drive rather than take public transit, we may rationalize that our individual actions aren’t actually all that significant, so driving isn’t that big a deal.

What happens in the brain

Particular parts of the brain get excited when we experience cognitive dissonance. These include the posterior medial frontal cortex, which is involved in avoiding aversive outcomes, the dorsolateral prefrontal cortex, which is associated with cognitive control, and the insula, which processes emotions.

However, just because our brains are antsy doesn’t mean that we need to run in the direction they’re pointing to. We can choose to accept and sit with discomfort.

Implications for decision-making

It’s useful to know about this because the uncomfortable feeling when you’re faced with new information that contradicts your beliefs isn’t an indicator that the new information is fishy. If you can accept that the squirmy feeling comes from cognitive dissonance and is perfectly natural, then you can let that feeling be and move on to evaluating that information in other ways.

The danger lies in assuming that the squirmy feeling is your gut telling you the new information is wrong. The new information might point out an important risk associated with your current behaviour, and you might really benefit from making changes. In that case, your gut is probably reacting to the possibility of change, which isn’t a great basis for decision-making.

Can you think of instances when cognitive dissonance has shaped your own reactions?


The Psychology Corner: Insights into psychology and psychological tests

The Psychology Corner has an overview of terms covered in the What Is… series, along with a collection of scientifically validated psychological tests.

Ashley L. Peterson headshot

Ashley L. Peterson


Ashley is a former mental health nurse and pharmacist and the author of four books.

25 thoughts on “What Is… Cognitive Dissonance”

  1. Cognitive dissonance is one of the few terms I remember from my university psych courses. Something we all do, often without even realizing it. The mind’s an amazing thing 🙂

  2. Cognitive dissonance doesn’t make me uncomfortable – it makes me thoughtful and intrigued – that I can hold 2 opposite beliefs/thoughts in my mind at the same time.

  3. I’m the same as you re animals. Re politics, I’m aware of the things I disagree with on my “side,” so I rationalize that the things I do agree with are more important, though sometimes I disagree with myself! 😂

  4. I really like your examples of situations that might cause challenges to come up and then be resolved in some way through ignoring or rationalizing, like with Covid19.

    With smoking, I just think about how I don’t breathe the smoke deep down into my lungs (I basically try puffing it straight back out), my lungs are buggered anyway thanks to recurrent chest infections, and how I have no life so cigs are the only real non-essential I spend my money on. I guess that’s all a lot of rationalising, but I’m okay with that 😉

    I think it’s easy enough to kick back against new information on the basis of how we don’t like new stuff or change, how we’d rather stick to what we know and the status quo of how things are. Really good point on how the dissonance and squirmy feeling doesn’t necessarily mean that the new information you’re presented with is wrong or should be ignored. It’s a better idea to sit with that feeling, think about why it’s there and what’s underlying it.

  5. I’m the poster guy for cognitive dissonance it would seem. I have a great difficulty with consistency and I’m letting go of those things that are causing my dissonance. And, this happens in more than one area of life. :/

  6. I’ve heard the term over the years from mental health workers I’ve encountered. Their objective in using the term with me is (I believe) to help me to do what you said “not let the ‘squirmy’ feeling point us in the wrong direction). I take that to mean have a knee jerk reaction to something that crosses some invisible line we’re not totally conscious of having. I am working (and may always be working) on not immediately jumping to the conclusion or have the reaction that closest mimics my own beliefs. It’s tough going too, because it’s a skill I lack. Cognitive dissonance has embarrassed the crap out of me time and again, because I tend to do that knee jerk thing. You’ve helped explain what that is, and why it’s important to monitor. Thank you!

  7. I was raised to be racist the first time I talked to someone of a different ethnicity I freaked out then realized that was ridiculous we are all human. I think that’s an example right?

Leave a Reply

%d bloggers like this: