Previous research has shown that White people smile more in interracial interactions compared to same-race interactions. However, the morphological features of smiles in such interactions have not been investigated. We explored the duration and frequency of Duchenne smiling (activation of AU6) among White American college students (N = 92) in brief same-race and interracial dyadic interactions. Results revealed no difference between the conditions in non-Duchenne smiling (activation of AU12 only), however, women (but not men) in same-race interactions displayed Duchenne smiles significantly more frequently and for longer durations compared to those in interracial interactions. The difference was not explained by reduced positive affect or by differential goals (e.g., greater desire to be liked by one’s partner) in same-race versus interracial interactions. However, the desire to be liked (vs. respected) by one’s partner predicted the duration of Duchenne smiles in both types of interaction. Given people’s preference for Duchenne smiles in general, and the sensitivity of racial minorities to Whites’ smiles in particular, these findings suggest yet another way in which interracial interactions may induce discomfort in people of color.

先前的研究表明，与同种族互动相比，白人在跨种族互动中的笑容更多。然而，尚未研究此类交互中微笑的形态特征。我们探讨了美国白人大学生 ( N = 92）在简短的同种和跨种族二元互动中。结果显示非杜氏微笑的条件之间没有差异（仅激活 AU12），但是，与跨种族互动的女性相比，同种族互动中的女性（但不是男性）显示杜氏微笑的频率更高，持续时间更长。在同种族与不同种族的互动中，这种差异不能用减少的积极影响或不同的目标（例如，更渴望被自己的伴侣喜欢）来解释。然而，被伴侣喜欢（相对于尊重）的愿望预测了杜兴微笑在两种类型的互动中的持续时间。鉴于人们普遍偏爱杜兴微笑，尤其是少数族裔对白人微笑的敏感性，