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Modifying attitudes and behaviours related to climate change is difficult. Attempts to offer information, appeal to values and norms or enact policies have shown limited success. Here we examine whether participation in a climate prediction market can shift attitudes by having the market act as a non-partisan adjudicator and by prompting participants to put their ‘money where their mouth is’. Across two field studies, we show that betting on climate events alters: (1) participants’ concern about climate change, (2) support for remedial climate action and (3) knowledge about climate issues. While the effects were dependent on participants’ betting performance in Study 1, they were independent of betting outcomes in Study 2. Overall, our findings suggest that climate prediction markets could offer a promising path to changing people’s climate-related attitudes and behaviour. 

A large gap exists between the concerns over the risks of climate change and the support needed for effective climate actions. We show that participating in a market where individuals make predictions on future climate outcomes and earn money can change climate attitudes, behaviour and knowledge. 

Abstract Successful communication and cooperation among different members of society depends, in part, on a consistent understanding of the physical and social world. What drives this alignment in perspectives? We present evidence from two neuroimaging studies using functional magnetic resonance imaging (fMRI;N = 66 with 2145 dyadic comparisons) and electroencephalography (EEG;N = 225 with 25,200 dyadic comparisons) to show that: (1) the extent to which people’s neural responses are synchronized when viewing naturalistic stimuli is related to their personality profiles, and (2) that this effect is stronger than that of similarity in gender, ethnicity and political affiliation. The localization of the fMRI results in combination with the additional eye tracking analyses suggest that the relationship between personality similarity and neural synchrony likely reflects alignment in the interpretation of stimuli and not alignment in overt visual attention. Together, the findings suggest that similarity in psychological dispositions aligns people’s reality via shared interpretations of the external world.