William J. Hawkins, Neil T. Heffernan, Yutao Wang, Ryan Shaun Baker. Extending the Assistance Model: Analyzing the Use of Assistance over Time. In Sidney K. D'Mello, Rafael A. Calvo, Andrew Olney, editors, Proceedings of the 6th International Conference on Educational Data Mining, Memphis, Tennessee, USA, July 6-9, 2013. pages 59-66, International Educational Data Mining Society, 2013. [doi]
Abstract is missing.