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Conspiracy theories affect your behaviour, whether or not you believe them

March 16, 2021 - INNSBRUCK, Austria

Conspiracy theories are more topical than ever. But what influence do they have on our behavior? Scientists led by behavioral economist Loukas Balafoutas investigated this question in a recently published study. The result: We don't need to believe in conspiracy theories for them to have an impact on us. Merely being confronted with them suffices.

Previous studies have shown that beliefs in conspiracy theories have an influence on the behavior of their adherents. For example, they lead to lower voter turnout or a lower willingness to get vaccinated. For years now, conspiracy theories have been experiencing a real boom - it is almost impossible to ignore them. This has prompted a research team led by Loukas Balafoutas to conduct a laboratory experiment to investigate whether conspiracy theories also have an impact on us when we do not believe in them and are only briefly confronted with them. "Our study shows that subjects who were exposed to a conspiracy theory for just three minutes acted differently in a subsequent behavioral experiment than subjects from the control group," reports Loukas Balafoutas, Professor of Experimental Economics at the Department of Finance at the University of Innsbruck. The researchers were recently able to publish these results in the journal "Economic and Political Studies".

Photo by Tarik Haiga on Unsplash

Conspiracy theories change behavior

In the so-called EconLab of the University of Innsbruck, the researchers conducted their experiment before the COVID-19 pandemic. Half of the 144 participants in the study were shown a 3-minute video depicting the 1969 moon landing as a fake. The control group, on the other hand, watched an equally long video about the space shuttle program. Subsequently, the test persons participated in the so-called "money request game". The players were divided into pairs and asked to make a simultaneous integer bid between 5 and 14 euros. Whoever made the smaller bid received the amount of that bid plus 10 euros; whoever made the larger bid received only the amount of the bid. In the event of a tie, both participants received exactly their bid. In this game, the best response to a bid larger than 5 euros from the other participant is to bid exactly one euro less. If the other participant bids 5 euros, the best response is to bid 14 euros. "In this experiment, we found that subjects who had previously watched the conspiracy theory video bid smaller amounts. This shows that these test persons act more strategically. On the one hand, this can possibly lead to a higher profit in the game, but at the same time this approach also carries the risk of incurring a loss," explains Balafoutas. "So our aim here is not to evaluate this behavior as better or worse, but simply to show that people who were exposed to a conspiracy theory shortly beforehand display different behavior than the control group in a subsequent situation that is completely different in terms of content. From this we conclude that the conspiracy theory has an influence on how someone perceives the world and other people," Balafoutas continues.

Trust remains

In another experiment, the so-called "trust game," the researchers tested the extent to which exposure to a conspiracy theory leads to an impairment of trust toward others. In this game, players were divided into pairs. In each pair, both players received 5 euros. One of the players (A) could decide to invest part or all of the amount. The invested amount was tripled and given to the other player (B), who could then transfer part of the money back to player A - but did not have to. Larger amounts invested by A in this game correspond to a higher level of trust. "It is quite a positive message that we did not find any negative influence of the conspiracy theory here. Trust in the other person was statistically the same in both groups. That's important, because in our society we need a certain level of trust for it to function at all," Balafoutas says.

That the scientists studied conspiracy theories in the lab is no coincidence. "As researchers, we don't want to contribute to spreading conspiracy theories into society. Therefore, caution is always required in such studies. They must be carried out in an ethically justifiable manner and must also be approved in advance. It is particularly important to debrief the test subjects after such an experiment," explains Loukas Balafoutas.


Balafoutas, L., Libman, A., Selamis, V., & Vollan, B. (2021). Exposure to conspiracy theories in the lab. Economic and Political Studies, 1–23. doi:10.1080/20954816.2020.1818930


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Human Nature News reports the latest findings across all fields of rational inquiry into the nature of ourselves. We focus on two broad themes where advances have accelerated during recent decades. Our first theme covers the latest scientific research into the nature and origins of human morality, consciousness, social organisation, values, and beliefs. Our second major theme is historical - the evolution of our species, the story of our migrations across the globe, and the earliest developments of human culture.