Using Scalp Electrical Biosignals to Control an Object by Concentration and Relaxation Tasks: Design and Evaluation

Laurent George 1, * Fabien Lotte 2 Raquel Viciana Abad 3 Anatole Lécuyer 1
* Auteur correspondant
1 VR4I - Virtual Reality for Improved Innovative Immersive Interaction
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, ENS Cachan - École normale supérieure - Cachan, Inria Rennes – Bretagne Atlantique
2 IPARLA - Visualization and manipulation of complex data on wireless mobile devices
Université Sciences et Technologies - Bordeaux 1, Inria Bordeaux - Sud-Ouest, École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), CNRS - Centre National de la Recherche Scientifique : UMR5800
Abstract : In this paper we explore the use of electrical biosignals measured on scalp and corresponding to mental relaxation and concentration tasks in order to control an object in a video game. To evaluate the requirements of such a system in terms of sensors and signal processing we compare two designs. The first one uses only one scalp electroencephalographic (EEG) electrode and the power in the alpha frequency band. The second one uses sixteen scalp EEG electrodes and machine learning methods. The role of muscular activity is also evaluated using five electrodes positioned on the face and the neck. Results show that the first design enabled 70% of the participants to successfully control the game, whereas 100% of the participants managed to do it with the second design based on machine learning. Subjective questionnaires confirm these results: users globally felt to have control in both designs, with an increased feeling of control in the second one. Offline analysis of face and neck muscle activity shows that this activity could also be used to distinguish between relaxation and concentration tasks. Results suggest that the combination of muscular and brain activity could improve performance of this kind of system. They also suggest that muscular activity has probably been recorded by EEG electrodes.
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Communication dans un congrès
IEEE-EMBS. International Conference of the IEEE EMBS, Aug 2011, Boston, United States. 2011, 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'11)
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  • HAL Id : inria-00634549, version 1
  • ARXIV : 1111.5285

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Laurent George, Fabien Lotte, Raquel Viciana Abad, Anatole Lécuyer. Using Scalp Electrical Biosignals to Control an Object by Concentration and Relaxation Tasks: Design and Evaluation. IEEE-EMBS. International Conference of the IEEE EMBS, Aug 2011, Boston, United States. 2011, 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'11). 〈inria-00634549〉

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