A 2 (good vs bad mood) × 2 (important vs unimportant) × 2 (success vs failure) experimental design was used to investigate whether importance could moderate mood effects on students' performance attributions. Attributions were analyzed in terms of their underlying dimensions (locus, stability, and controllability) as specified by B. Weiner (1985). Undergraduate business students (31 men, 49 women) were randomly assigned to 1 of the 8 experimental conditions. Analysis revealed a significant 3-way interaction of mood, importance, and performance outcome (p