Design and user evaluation of a joystick-operated full-screen magnifier

Sri Kurniawan, Alasdair King, David Gareth Evans, Paul Blenkhorn
2003 Proceedings of the conference on Human factors in computing systems - CHI '03  
The paper reports on two development cycles of a joystickoperated full-screen magnifier for visually impaired users. In the first cycle of evaluation, seven visually impaired computer users evaluated the system in comprehensionbased sessions using text documents. After considering feedback from these evaluators, a second version of the system was produced and evaluated by a further six visually impaired users. The second evaluation was conducted using information-seeking tasks using Web pages.
more » ... n both evaluations, the 'thinking aloud protocol' was used. This study makes several contributions to the field. First, it is perhaps the first published study investigating the use of a joystick as an absolute and relative pointing device to control a screen magnifier. Second, the present study revealed that for most of the visually impaired users who participated in the study the joystick had good spatial, cognitive and ergonomic attributes, even for those who had never before used a joystick. CHI 2003: NEW HORIZONS of the operation of the magnifier. It is only when he/she needs to change some aspect of the magnifier's settings (for example, the magnification level) that he/she issues direct commands, typically through the keyboard.
doi:10.1145/642617.642618 fatcat:cvqfxhyswrgnznzbjukl2lduwu