Comparison Study of Biosignal based Computer Interfaces Based on Fitts’ Law Paradigm

Abstract

This paper presents development of two different biosignal based computer interfaces for people with motor disabilities: 1) electromyography (EMG)-based computer interface (ECI) and 2) hybrid EMG-based computer interface (HECI). The ECI made both movements of a cursor and clicking from muscle contractions induced by volitional wrist movements. On the other hand, the HECI made movements of a cursor from the lower arm movements under a motion capture camera, and clicking from muscle contractions induced by volitional movements of index and middle fingers. These interfaces were tested by the experiments based on a Fitts’ law paradigm in order to provide object evaluation of the interfaces. These results were also compared to a commercial brain computer interface was evaluated under the same test setup.