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Public trust in scientists is critical to our ability to face societal threats. Here, across five pre-registered studies (N = 2,034), we assessed whether perceptions of scientists’ intellectual humility affect perceived trustworthiness of scientists and their research. In study 1, we found that seeing scientists as higher in intellectual humility was associated with greater perceived trustworthiness of scientists and support for science-based beliefs. We then demonstrated that describing a scientist as high (versus low) in intellectual humility increased perceived trustworthiness of the scientist (studies 2–4), belief in their research (studies 2–4), intentions to follow their research-based recommendations (study 3) and information-seeking behaviour (study 4). We further demonstrated that these effects were not moderated by the scientist’s gender (study 3) or race/ethnicity (study 4). In study 5, we experimentally tested communication approaches that scientists can use to convey intellectual humility. These studies reveal the benefits of seeing scientists as intellectually humble across medical, psychological and climate science topics. 

Liberals and conservatives in the United States exhibit intergroup bias toward those on the other side. In three preregistered experiments (N = 1,389), we examined the bias-reducing benefits of individuating members of the political outgroup by providing people with individuating information—information that provides knowledge about them beyond their group membership, such as their social roles, emotions, and personality. Studies 1 and 2 extended work on individuating information into this domain by testing its impact on a novel political outgroup member. Study 3 broke new ground by testing whether the benefits of learning individuating information can extend to additional members of the outgroup. Each methodology revealed that, compared to those who read non-individuating controls, participants who learned individuating information about a political outgroup member were less hostile and more empathic toward that outgroup member. The current studies thus identify a promising avenue for reducing interparty hostility.