Public self-service kiosks provide key servicessuch as ticket sales, airport check-in and general information.Such kiosks must be universally designed to be usedby society at large, irrespective of the individual users’physical and cognitive abilities, level of education andfamiliarity with the system. The noble goal of universalaccessibility is hard to achieve. This study reports experienceswith a universally designed kiosk prototype based ona multimodal intelligent user interface that adapts to theuser’s physical characteristics. The user interacts with thesystem via a tall rectangular touch-sensitive display wherethe interaction area is adjusted to fit the user’s height.A digital camera is used to measure the user’s approximatereading distance from the display such that the text size canbe adjusted accordingly. The user’s touch target accuracy ismeasured, and the target sizes are increased for users withmotor difficulties. A Byzantine visualization technique isemployed to exploit unused and unreachable screen realestate to provide the user with additional visual cues. Thetechniques explored in this study have potential for mostpublic self-service kiosks.
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