G-Menu: A Keyword-by-Gesture based Dynamic Menu Interface for Smartphones

Instead of relying on graphical or vocal modalities for searching an item by keyword (called K-Menu), this paper presents the G-Menu exploiting gesture interaction and gesture recognition: when a user sketches a keyword by gesturing the first letters of its label, a menu with items related to the recognized letters is constructed dynamically and presented to the user for selection and auto-completion. The selection can be completed either gesturally by an appropriate gesture (called the G-Menu) or by touch only (called the T-Menu). This paper compares the three types of menu, i.e., by keyword, by gesture, and by touching, in a user study with twenty participants on their item selection time (for measuring task efficiency), their error rate (for measuring task effectiveness), and their subjective satisfaction (for measuring user satisfaction)