Inductive pointing device for tongue control system for computers and assistive devices.
Experimental results for pointing tasks using a tongue control system are reported in this paper. Ten untrained subjects participated in the experiment. Both typing and pointing tasks were performed, in three short-term training sessions, in consecutive days, by each subject. The system provided a key pad (14 sensors) and a mouse pad (10 sensors with joystick functionality) whose placements were interchanged (front, back) in half of the subjects. The pointing tasks consisted of selecting and tracking a target circle (of 50, 75 and 100 pixels diameter) that occurred randomly in each of the 16 positions uniformly distributed along the perimeter of a layout circle of 250 pixels diameter. The throughput was of 0.808 bits per second and the time on target was of 0.164 of the total tracking time. The pads layout, the subjects, the sessions, the target diameters, and the angle of the tracking direction had a statistically significant effect on the two performance measures. Long term training is required to assess the improvement of the user capability.
Lontis
Eugen R
ER
Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7, D3, 9220 Aalborg, Denmark. lontis@hst.aau.dk
Caltenco
Hector A
HA
Bentsen
Bo
B
Christensen
Henrik V
HV
Lund
Morten E
ME
Struijk
Lotte N S Andreasen
LN
D003143:Communication Devices for People with Disabilities; D016287:Computer Peripherals; D003201:Computers; D004867:Equipment Design / Q000295:instrumentation*; D006804:Ergonomics / Q000295:instrumentation; D006801:Humans; D008328:Man-Machine Systems; D012656:Self-Help Devices; D012984:Software; D014059:Tongue / Q000502:physiology*; D014159:Transducers; D014584:User-Computer Interface