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 E-Mail The Black Lives Matter movement has brought increasing attention to disparities in how police officers treat Black and white Americans. Now, research published by the American Psychological Association finds that disparity may exist even in subtle differences in officers tone of voice when they address Black and white drivers during routine traffic stops. In the study, published in the Journal of Personality and Social Psychology, researchers gathered short audio excerpts from police body camera footage and found that when officers spoke to Black men at traffic stops, their tone of voice conveyed less warmth, respect and ease than when they spoke to white men. The researchers also found that these subtle negative interactions can contribute to a cycle of mistrust between police and the Black community.

United statesJennifer eberhardtDan jurafskyRob voigtAmerican psychological associationStanford universityNorthwestern universityProsody undermine institutionalUniversity of michiganBlack lives matterSocial psychologyNicholas campThin blue waveformRacial disparitiesOfficer prosody undermine institutional trustSocial cognition