I was reading an article by Kenny & Gunter about Intrinsic motivation and learning. I am trying to think about games and learning in relation to Chance's and Kohn's articles on rewards, extrinsic, and intrinsic motivation. Kenny & Gunter support that game designers must exploit the natural motivation that players/learners have by developing them to promote intrinsic motivation, content learning, transfer of knowledge, and naturalization. As learning scientists, we need to consider the learners' needs, and provide (or not) rewards that are effective for meaningful learning. Several studies that are mentioned in Chance's and Kohn's articles show that there are cases where rewards work for intrinsic motivation, but in some other situations, rewards do not work as we think they do.
The reference for the article is: Kenny, R. F. & Gunter, G. A. (2008) Endogenous fantasy-based serious games: Intrinsic motivation and learning. International journal of social sciences. Vol.2, No.1. pp. 8-13