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Smith, G. & Olkun, S. (2004). How Interactivity Works: priming of mental rotation. In L. Cantoni & C. McLoughlin (Eds.), Proceedings of ED-MEDIA 2004--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 4293-4302). Lugano, Switzerland: Association for the Advancement of Computing in Education (AACE).