Derek Lomas, Kishan Patel, Jodi Forlizzi, Kenneth R. Koedinger. Optimizing challenge in an educational game using large-scale design experiments. In Wendy E. Mackay, Stephen A. Brewster, Susanne Bødker, editors, 2013 ACM SIGCHI Conference on Human Factors in Computing Systems, CHI '13, Paris, France, April 27 - May 2, 2013. pages 89-98, ACM, 2013. [doi]
Abstract is missing.