Article summary
This article reports three pre-registered field experiments in which 230 canvassers held in-person conversations with 6,869 US voters about unauthorized immigrants and transgender people. Conversations that combined arguments with a non-judgmental exchange of personal narratives produced small but durable reductions in exclusionary attitudes (effects d ≈ 0.04–0.08), with impacts persisting for at least four months. Pure argument-only conversations showed no measurable effect.