@inproceedings{EDM-2015-LiuK,
	author        = "Ran Liu 0008 and Kenneth R. Koedinger",
	booktitle     = "{Proceedings of the Eighth International Conference on Educational Data Mining}",
	ee            = "http://www.educationaldatamining.org/EDM2015/proceedings/short420-423.pdf",
	isbn          = "978-8-4606-9425-0",
	pages         = "420--423",
	publisher     = "{International Educational Data Mining Society}",
	title         = "{Variations in Learning Rate: Student Clustering Based on Systematic Residual Error Patterns Across Practice Opportunities}",
	year          = 2015,
}