Brain Computer Interface Cursor Measures for Motion-impaired and Able-bodied Users

Abstract This paper presents the results of experimental studies that aim to measure the effectiveness of a Brain Computer Interface (BCI) against a mouse on “point and click” tasks performed by ablebodied and upper-limp motion-impaired users. Our methodology is based on the ISO 9241-9 guidelines. We examine how Fitts’ law fits the tested input devices, and we use gross and detailed trajectory measures in order to quantify cursor movement and evaluate performance. We conclude that Fitts’ law can only describe able-bodied users’ performance when selecting targets with the mouse. On the other hand, the performance of both user groups with the BCI, and of motionimpaired users with the mouse does not conform to Fitts’ law. Tables and charts of results are given, showing that the BCI cannot currently compete with the mouse in terms of usability, but can be used as an alternative for motion actuated devices when no other solution is possible.

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