Nonverbal facial cues signaling sexually transmitted infections cause dehumanization and discrimination

Dehumanization often underlies the social ostracism, exclusion, and discrimination experienced by stigmatized group members. Given findings that people can detect sexually transmitted infection (STI) status from nonverbal facial cues, we tested whether people would dehumanize and discriminate against STI-positive individuals from detecting their stigmatized status. Specifically, we hypothesized that nonverbal stigma cues would stimulate dehumanizing reactions that lead to biases against hiring STI-positive individuals. Results showed that people dehumanize STI-positive individuals based on their nonverbal stigma cues (i.e., negative affect; Study 1), except when STI status is explicitly disclosed (Study 2), which leads to potential hiring biases (Study 3). Dehumanization and discrimination against STI-positive individuals may therefore depend on the stigma's legibility from nonverbal cues but may be tempered by explicit information about STI status.