Result: Brain―computer interface controlled gaming: Evaluation of usability by severely motor restricted end-users
Department of Machine Learning, Technical University (TU) Berlin, Marchstrasse 23, 10587 Berlin, Germany
Beratungsstelle für Unterstützte Kommunikation (BUK), Waldemarstrasse 28 a, 55543 Bad Kreuznach, Germany
BrainLinks-BrainTools Excellence Cluster, University of Freiburg, Germany
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Psychology. Ethology
Scanning and diagnostic techniques (generalities)
FRANCIS
Further Information
Objective: Connect-Four, a new sensorimotor rhythm (SMR) based brain―computer interface (BCI) gaming application, was evaluated by four severely motor restricted end-users; two were in the locked-in state and had unreliable eye-movement. Methods: Following the user-centred approach, usability of the BCI prototype was evaluated in terms of effectiveness (accuracy), efficiency (information transfer rate (ITR) and subjective workload) and users' satisfaction. Results: Online performance varied strongly across users and sessions (median accuracy (%) of end-users: A = .65; B = .60; C = .47; D = .77). Our results thus yielded low to medium effectiveness in three end-users and high effectiveness in one end-user. Consequently, ITR was low (0.05-1.44 bits/min). Only two end-users were able to play the game in free-mode. Total workload was moderate but varied strongly across sessions. Main sources of workload were mental and temporal demand. Furthermore, frustration contributed to the subjective workload of two end-users. Nevertheless, most end-users accepted the BCI application well and rated satisfaction medium to high. Sources for dissatisfaction were (1) electrode gel and cap, (2) low effectiveness, (3) time-consuming adjustment and (4) not easy-to-use BCI equipment. All four end-users indicated ease of use as being one of the most important aspect of BCI. Conclusion: Effectiveness and efficiency are lower as compared to applications using the event-related potential as input channel. Nevertheless, the SMR-BCI application was satisfactorily accepted by the end-users and two of four could imagine using the BCI application in their daily life. Thus, despite moderate effectiveness and efficiency BCIs might be an option when controlling an application for entertainment.