@inproceedings{CHI-2013-LomasPFK,
	author        = "Derek Lomas and Kishan Patel and Jodi Forlizzi and Kenneth R. Koedinger",
	booktitle     = "{Proceedings of the 31st ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/2470654.2470668",
	isbn          = "978-1-4503-1899-0",
	pages         = "89--98",
	publisher     = "{ACM}",
	title         = "{Optimizing challenge in an educational game using large-scale design experiments}",
	year          = 2013,
}