A taxonomic model of intrinsic motivations for learning
Thomas W. Malone and Mark R. Lepper. 1987. Making learning fun: A taxonomic model of intrinsic motivations for learning. In Aptitude learning and instruction III: Conative and affective process analysis, R E Snow and M J Farr (eds.). Erlbaum, Hillsdale, NJ, 223--253.
1987