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The findings are published in Psychological Science, a journal of the Association for Psychological Science.
"We could not confirm our initial hypothesis that the tendency to reject randomness, or to perceive order and meaning where there is only noise, was associated with the endorsement of conspiracy theories," explains lead researcher Sebastian Dieguez.
"Although negative findings are usually unpopular in scientific journals, we think our results are valuable because they contradict a widely held and quite plausible idea of what leads to conspiracist thinking. By ruling out a very straightforward and cognitively simple mechanism, we narrow down the range of explanations for the popularity of conspiracy theories."
To investigate the relationship between conspiracist beliefs and perceptions of randomness, the researchers designed three separate experiments in which participants were asked to look at strings of 12 Xs and Os that supposedly represented a series of outcomes.
In the first experiment, 107 university student participants were told that some of the strings were created using a fair coin and were, therefore, random; they were also told that other strings represented non-random outcomes, such as computer calculations or a sports team's wins and losses. The participants were presented with a series of 40 such strings - for each one, they were asked to rate the randomness of the string on a scale of 1 (certainly random) to 6 (certainly not random).
In a purportedly unrelated "translation" task, participants completed measures that gauged their general belief in conspiracy theories, their belief in specific conspiracy theories (e.g., that the Apollo 11 moon landing was faked), and their perceptions of conspiracy in certain scenarios.
The results showed that participants' responses on the conspiracy theory measures were correlated - in other words, participants who reported a strong belief in general conspiracy theories also tended to report other types of conspiracist beliefs.
But, the researchers did not find any evidence to suggest that people who tended to believe conspiracy theories were more likely to see intention or design in the letter strings.
A follow-up study with 123 university students and an online study with 217 adults showed the same pattern of findings - while participants' conspiracist beliefs in one area were associated with conspiracist beliefs in another area, there was no evidence to suggest that believers were biased toward seeing intention in the letter strings.
And all three studies indicated that participants were sensitive to the complexity of the strings - for example, they tended to rate the string XXXXXXXXXOOX as less random than the string XOOXOXOOOOXX. These results align with the probability that a randomly chosen algorithm would produce the strings, suggesting that the participants were attuned, in some way, to the likely randomness of the strings.
"Conspiracy theories are now widespread and they develop increasingly faster, sometimes minutes after a dramatic event," says Dieguez. "Research has shown that they affect health decisions, political and voting behavior, reliance on science, and underlie many extremist and violent actions. Our research contributes to understanding the psychological and social mechanisms that do - or, in this case, do not - facilitate their endorsement and spreading."
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