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Han, K. & Joung, S. (2004). The Effects of Learner-Centered Design of Web-based Instructional Systems on Ease of Access, Interactivity, and Individualized Learning. In J. Nall & R. Robson (Eds.), Proceedings of E-Learn 2004--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 1238-1243). Washington, DC, USA: Association for the Advancement of Computing in Education (AACE).