Defining and quantifying users' mental imagery-based BCI skills: a first step

Journal of Neural Engineering
Fabien Lotte, Camille Jeunet

Abstract

While promising for many applications, electroencephalography (EEG)-based brain-computer interfaces (BCIs) are still scarcely used outside laboratories, due to a poor reliability. It is thus necessary to study and fix this reliability issue. Doing so requires the use of appropriate reliability metrics to quantify both the classification algorithm and the BCI user's performances. So far, classification accuracy (CA) is the typical metric used for both aspects. However, we argue in this paper that CA is a poor metric to study BCI users' skills. Here, we propose a definition and new metrics to quantify such BCI skills for mental imagery (MI) BCIs, independently of any classification algorithm. We first show in this paper that CA is notably unspecific, discrete, training data and classifier dependent, and as such may not always reflect successful self-modulation of EEG patterns by the user. We then propose a definition of MI-BCI skills that reflects how well the user can self-modulate EEG patterns, and thus how well he could control an MI-BCI. Finally, we propose new performance metrics, classDis, restDist and classStab that specifically measure how distinct and stable the EEG patterns produced by the user are, independently of any...Continue Reading

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Citations

Nov 16, 2019·Journal of Neural Engineering·Amanda Medeiros de FreitasJérémie Mattout
Nov 15, 2019·Journal of Neural Engineering·Daniel Freer, Guang-Zhong Yang
Jan 22, 2020·Journal of Neural Engineering·Marko AngjelichinoskiVahid Tarokh
Sep 15, 2018·Journal of Neural Engineering·Zied TayebJörg Conradt
Mar 28, 2020·Journal of Neural Engineering·Carolina MigliorelliVictoria San Antonio-Arce
Apr 10, 2020·Journal of Neural Engineering·Andreas SchwarzGernot R Müller-Putz
Sep 10, 2020·Frontiers in Human Neuroscience·Minji LeeSeong-Whan Lee
Sep 12, 2020·Journal of Neural Engineering·Demetres Kostas, Frank Rudzicz
May 6, 2020·Journal of Neural Engineering·Jennifer StisoDanielle S Bassett
Nov 13, 2020·Journal of Neural Engineering·Aline RocFabien Lotte
Apr 6, 2021·Frontiers in Human Neuroscience·Camille BenarochFabien Lotte
Mar 20, 2019·L'Encéphale·J-M BatailUNKNOWN NExT group
Jun 25, 2021·Frontiers in Human Neuroscience·Xu DuanZhenzhen Wang

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