Ideal affect match influences giving (Study 1). (A) Facial stimuli: Stimuli varied by emotional expression (excited, calm, neutral), race (White, Asian) and sex (male, female). Neutral expressions were treated as fillers, and are shown in Supplementary Materials Section S1. (B) Cultural differences in ideal affect: European Americans valued HAP more than LAP, Koreans valued LAP more than HAP, and European Americans valued HAP more and LAP less than Koreans. Ps ≤ 0.05, except b vs d P = 0.052. (C) Ratio of offers: European Americans offered more (regardless of endowment) to excited than calm recipients; Koreans offered more to calm than excited recipients. European Americans offered more to excited recipients than did Koreans. Ps < 0.001. (D) Ratio of offers divided by recipients’ expression, race, and sex: Cultural differences in offers to excited vs calm recipients held across recipient race and sex. Error bars represent standard errors (S.E.). Ps < 0.05. In all panels, different letters indicate significant differences at indicated P-levels.