“…Although generally perceived to be competent in their jobs, scientists are not the best communicators and score relatively poorly on perceptions of warmth and benevolence (Fiske & Dupree, 2014). There is some evidence that humor and laughter can increase the perceptions of communicator warmth without affecting perceived competence (Stewart et al, 2019) and generally have positive downstream effects on communicative outcomes (Cacciatore et al, 2020; Yeo, Anderson, et al, 2020; Yeo, Su, et al, 2020). Here, we conducted an experiment to examine how source characteristics, specifically race, gender, and credentials, affect perceived communicator effectiveness.…”