American undergraduate students' task liking and intrinsic motivation were examined using 2 × 2 × 2 (Self-Esteem × Task Label × Feedback) analyses of variance. Identical tasks were labeled as either difficult or easy, and bogus performance feedback was given randomly to each subject. For subjects with high self-esteem, feedback had strong impact on their liking of a difficult task, whereas for those with low self-esteem, feedback had strong impact on liking of an easy task. After positive feedback for performing a difficult task, subjects with high self-esteem increased task liking, whereas those with low self-esteem decreased task liking. Subjects also showed higher intrinsic motivation after positive feedback than after negative feedback. © 1991 Taylor & Francis Group, LLC.