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Multi-Session Influence of Two Modalities of Feedback and Their Order of Presentation on MI-BCI User Training

Abstract : By performing motor-imagery tasks, for example, imagining hand movements, Motor-Imagery based Brain-Computer Interfaces (MI-BCIs) users can control digital technologies, for example, neuroprosthesis, using their brain activity only. MI-BCI users need to train, usually using a unimodal visual feedback, to produce brain activity patterns that are recognizable by the system. The literature indicates that multimodal vibrotactile and visual feedback is more effective than unimodal visual feedback, at least for short term training. However, the multi-session influence of such multimodal feedback on MI-BCI user training remained unknown, so did the influence of the order of presentation of the feedback modalities. In our experiment, 16 participants trained to control a MI-BCI during five sessions with a realistic visual feedback and five others with both a realistic visual feedback and a vibrotactile one. training benefits from a multimodal feedback, in terms of performances and self-reported mindfulness. There is also a significant influence of the order presentation of the modality. Participants who started training with a visual feedback had higher performances than those who started training with a multimodal feedback. We recommend taking into account the order of presentation for future experiments assessing the influence of several modalities of feedback.
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https://hal.inria.fr/hal-03175123
Contributor : Fabien Lotte <>
Submitted on : Friday, March 19, 2021 - 5:58:24 PM
Last modification on : Thursday, March 25, 2021 - 4:00:03 PM

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Léa Pillette, Bernard N’kaoua, Romain Sabau, Bertrand Glize, Fabien Lotte. Multi-Session Influence of Two Modalities of Feedback and Their Order of Presentation on MI-BCI User Training. Multimodal Technologies and Interaction, MDPI, 2021, 5 (3), pp.12. ⟨10.3390/mti5030012⟩. ⟨hal-03175123⟩

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