Lasse Hakulinen, Tapio Auvinen, Ari Korhonen. Empirical Study on the Effect of Achievement Badges in TRAKLA2 Online Learning Environment. In 2013 Learning and Teaching in Computing and Engineering, LaTiCE 2013, Macau, Macao, March 21-24, 2013. pages 47-54, IEEE Computer Society, 2013. [doi]
Abstract is missing.