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Two experiments investigated the effects of achievement goals on intrinsic motivation for an enjoyable pinball game. Study 1 manipulated Ss' performance (demonstrating ability) and mastery (developing one's skills) achievement goals and contrasted them with a neutral control group. Study 2 replicated Study 1 and extended it by additionally providing (or not) Ss with positive, goal-relevant feedback. Results were consistent across studies, indicating that individual differences in achievement orientation moderated the influence of achievement goals on intrinsic motivation. Specifically, performance goals enhanced intrinsic motivation for achievement-oriented individuals, whereas mastery goals enhanced interest for those low in achievement orientation. The results were discussed in the context of J. M. Harackiewicz and C. Sansone's (1991) model of intrinsic motivation processes.