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A lot of research has been dedicated to understanding what makes people believe in conspiracies – and how they might be able to climb out of the rabbit hole again.

Conspiracies do happen. The Watergate scandal in the 1970s, which led to the resignation of US President Richard Nixon, is arguably the most infamous example. The questioning of authority and the official narrative is something that should be encouraged.

But some people believe conspiracy theories that are contrary to evidence. Recent research found 8.9% of New Zealand participants and 10.1% of Australian participants agreed with the (false) claim fluoride is being intentionally added to the water supply by the government to make people less intelligent and easier to control".

What draws people to conspiracies like these?

One prominent theory is that conspiracy beliefs are linked to psychological distress such as anxiety and depression.

Our new research explores the causal relationship – whether psychological distress actually makes people more likely to believe in conspiracy theories. We found very limited evidence for a link between elevated distress and conspiracy beliefs.

What research suggests about conspiracy beliefs

The existential threat model of conspiracy theories suggests experiences of psychological distress can make people more likely to develop conspiracy beliefs because they search for explanations for distressing events.

This model argues distress actually worsens once a conspiracy belief is formed, creating a vicious cycle where distress breeds conspiracy belief which, in turn, generates more distress.

The model also suggests this belief is exacerbated when a despised outgroup (political elites, for example) becomes salient as people try to make sense of their experience.

However, few have rigorously tested this claim. While substantial evidence for a correlation between psychological distress and belief in conspiracy theories has been established, correlation does not imply a causal link.

Some analyses of longitudinal data haven’t found evidence to support the hypothesis. But no one has directly tested the claims of the existential threat model.

We set out to do this using a longitudinal survey.

A longitudinal study isn’t as conclusive as a true experiment but it can establish the sequence of cause and effect and rule out some alternative explanations for a relationship.

Our sample consisted of 995 participants with representatives groups from New Zealand, Australia and the United Kingdom. Each month from September 2022 to February 2023, we presented participants with a survey, including 11 conspiracy theories and common measures of anxiety, depression and stress. Each month we asked them about their level of agreement with the conspiracy theories, and their levels of psychological distress.

Prior to collecting the data, we specified our hypotheses in our research plan. These boiled down to the ideas that increased distress of different types (anxiety, depression, stress) will subsequently increase belief in conspiracy theories and that such beliefs will subsequently increase distress.

Rethinking the vicious cycle

We found very limited evidence for elevated distress subsequently increasing belief in conspiracy theories.

We also found no evidence to support the converse – that belief in conspiracy theories increases distress.

Our findings suggest beliefs in conspiracy theories may mostly reflect a relatively stable worldview rather than being driven by temporary changes in distress.

This matters because some researchers have suggested interventions that reduce stress could be used to help reduce conspiracy beliefs. However, if stress is not driving conspiracy beliefs, as our results suggest, this approach is unlikely to be effective.

We also found no evidence that conspiracy beliefs cause short-term distress. This challenges the common assumption that beliefs in conspiracy theories inherently cause harm to one’s mental health, particularly stress, anxiety and depression. That said, conspiracy beliefs could still cause harm in other ways – such as by contributing to the flow of misinformation.

Our research challenges the idea of a vicious cycle of conspiracy beliefs. It appears distress may not have a key role in making people “spiral” down the rabbit hole.

Interventions that foster an analytical mindset or include critical thinking skills may be more useful.

This article is republished from The Conversation, a nonprofit, independent news organization bringing you facts and trustworthy analysis to help you make sense of our complex world. It was written by: Nick Fox, Te Kunenga ki Pūrehuroa – Massey University; Matt Williams, Te Kunenga ki Pūrehuroa – Massey University, and Stephen Hill, Te Kunenga ki Pūrehuroa – Massey University

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The following research is supported by the Marsden Fund, managed by the Royal Society Te Apārangi.

This study was supported by the Marsden Fund, managed by the Royal Society Te Apārangi.