4[1]Lepper M R, Henderlong J. Turning "play" into "work" and "work" to "play": 25 years of research on intrinsic versus extrinsic motivation. In: Sansone et al ed. Intrinsic and Extrinsic Motivation. Academic Press, 2000. 257～298
5[2]Eisenberger R, Cameron J. Detrimental effects of reward: reality of myth? American Psychologist, 1996, 51: 1153～1166
6[3]Amabile T M. Motivational synergy: toward new conceptualizations of intrinsic and extrinsic motivation in the workplace. Human Resource Management Review, 1993, 3: 185～201
7[4]Lepper M R et al. Intrinsic and extrinsic motivation: A Developmental perspective. In: Luther et al. Developmental psychopathology: perspectives on adjustment, risk, and disorder. New York, 1997. 23～50
8[5]Hart S, Jackson B K. Trait vs nontrait conceptualizations of intrinsic/extrinsic motivational orientation. Motivation and Emotion, 1992, 16: 209～230
9[6]Hennessey B A, Amabile T M. Reward, intrinsic motivation, and creativity. American Psychologist, 1998, 53: 674～675
10[7]Deci E L, Ryan R M. The "what" and "why" of goal pursuits: Human needs and the self-determination of behavior. Psychological Inquiry, 2000, 11(4): 227～269
