5/ Huge congratulations to co-first authors @fabiencerrotti.bsky.social & @carolinepioger.bsky.social , and many thanks to @watarutoyokawa.bsky.social & @mael-lebreton.bsky.social for the collaboration.

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4/ Effects on belief and preferences were still detectable weeks later. More broadly, we hope this work makes a case for adding reinforcement learning to the applied behavioural science toolbox.

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4/ And the effects went beyond knowledge: belief correction predicted shifts in investment preferences toward cleaner and safer energy mixes. Reinforcement → belief correction → preference change.

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3/ We then tested a very simple intervention inspired by reinforcement learning: make a choice → receive immediate feedback → learn. This brief training substantially corrected beliefs, especially where initial misconceptions were strongest.

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2/ Across 7 countries, we found robust misconceptions about energy sources — notably overestimating the CO₂ emissions and mortality associated with nuclear power, and underestimating the health costs of biomass.

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