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Command memorization: spatial positions versus directional gestures

To execute a command, a user can make a selection in a menu using pointing actions, or, for example, use shortcuts such as gestures. To go faster, she can learn the positions to point or gestures to perform. In this paper, we present a study comparing learning of positions or directions to select commands. The results obtained reveal similar recall rates, with a slight advantage for positions. The qualitative results suggest an advantage of positions over directions for physical and mental demands. Finally, the study of memorization strategies developed by the subjects provides mnemonic methods that can be useful for designers and users.