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NOTTINGHAM, UK – A new study conducted by researchers at the University of Nottingham has revealed a potential link between poor sleep quality and increased susceptibility to conspiracy theories. The research, published in the Journal of Health Psychology, suggests that individuals experiencing poor sleep are more likely to endorse conspiratorial beliefs, with depression playing a significant mediating role.
The study, which involved over 1,000 participants across two separate investigations, explored the relationship between sleep quality and the acceptance of conspiracy narratives. In the first study, 540 participants completed a sleep quality assessment before reading an article about the Notre Dame Cathedral fire. Some participants were exposed to a conspiracy narrative suggesting a deliberate cover-up, while others read a factual account. The findings indicated that those with poorer sleep quality were more inclined to believe the conspiracy version of events.
The second study, involving 575 participants, delved deeper into the psychological mechanisms underlying this connection. The researchers found that both poor sleep quality and insomnia were positively associated with the endorsement of conspiracy theories. Notably, depression emerged as a key factor explaining this link. While anger and paranoia also played a role, their effects were less consistent.
“Sleep is crucial for mental health and cognitive functioning. Poor sleep has been shown to increase the risk of depression, anxiety, and paranoia—factors that also contribute to conspiracy beliefs,” explained Dr. Daniel Jolley, Assistant Professor in Social Psychology and lead researcher. “Our research suggests that improving sleep quality could serve as a protective factor against the spread of conspiratorial thinking.”
The study highlights the potential consequences of conspiracy beliefs, which can include increased vaccine hesitancy, climate change skepticism, and political distrust. By addressing sleep quality, researchers suggest that individuals may be better equipped to critically evaluate information and resist misleading narratives.
The research team, which included Research Fellow Dr. Iwan Dinnick and recent graduates Lauren Burgin, Sophie Ryan, Olivia Morgan-Finn, and Samuel Muncer, emphasized the importance of further investigation into sleep-focused interventions to mitigate susceptibility to conspiracy theories.
“These findings underscore the importance of prioritizing sleep health,” Dr. Jolley added. “By improving sleep quality, we may be able to enhance individuals’ resilience to conspiratorial thinking.”
More information: Investigating the Link Between Sleep Quality and Belief in Conspiracy Theories, Journal of Health Psychology (2025). DOI: 10.1177/13591053251320598
Disclaimer: This article is based on a single study and further research is needed to confirm these findings. Correlation does not equal causation, and other factors may contribute to both poor sleep and belief in conspiracy theories. This information should not be used as a substitute for professional medical or psychological advice. If you are experiencing sleep problems or struggling with mental health, please consult with a qualified healthcare provider.
