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1 GE Healthcare - General Electric Medical Systems Buc 2 Télécom ParisTech 3 University of Canterbury

Abstract : We propose Augmented Letters, a new technique aimed at augmenting gesture-based techniques such as Marking Menus 9 by giving them natural, mnemonic associations. Augmented Letters gestures consist of the initial of command names, sketched by hand in the Unistroke style, and affixed with a straight tail. We designed a tentative touch device interaction technique that supports fast interactions with large sets of commands, is easily discoverable, improves user-s recall at no speed cost, and supports fluid transition from novice to expert mode. An experiment suggests that Augmented Letters outperform Marking Menu in terms of user recall.

Keywords : Handwriting Gestures Semantics Learning Recall Unistroke ACM Classification Keywords H52 Information interfaces and presentation: User Interfaces -Graphical user interfaces General Terms Human Factors Design Experimentation Measurement

Autor: Quentin Roy - Sylvain Malacria - Yves Guiard - Éric Lecolinet - James Eagan -



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