The bias contagion model. The left side of the figure illustrates Stage 1 of the model, the expression of nonverbal bias. Nonverbal bias can either occur as a veridical index of the expresser’s intergroup bias (direct causation) or because of worries about and strategies for appearing unbiased (indirect causation). The right side of the figure illustrates Stage 2 of the model, exposure to nonverbal bias. Through implicit learning, exposure to others’ nonverbal biases might lead observers to develop a tacit expectation of others’ affective responses. This tacit expectation may then lead to intergroup bias through normative or informational influence. Stage 2 also includes several important moderators that can interfere with implicit learning, normative influence, and/or informational influence.