Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
Metadatos
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Rieiro, Héctor; Díaz Piedra, Carolina; Morales, Jose Miguel; Catena Martínez, Andrés; Romero García, Samuel Francisco; Roca González, Joaquín; Fuentes, Luis J.; Di Stasi, Leandro LuigiEditorial
Sensors
Materia
brain activity Electroencephalography driving simulator low-cost wearables NeuroSky® MindWave Mobile headset
Fecha
2019-06-23Referencia bibliográfica
Rieiro, H., Diaz-Piedra, C., Morales, J. M., Catena, A., Romero, S., Roca-Gonzalez, J., ... & Di Stasi, L. L. (2019). Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study. Sensors, 19(12), 2808.
Patrocinador
Spanish Department of Transportation, Madrid, Spain (Grant No. SPIP2014-1426 to L.L.D.S.); A.C. is funded by a Spanish Ministry of Economy and Competitiveness grant (PSI2016-80558-R to A.C.); S.R. is funded by an Andalusian Government Excellence Research grant (P11-TIC-7983); L.J.F. is funded by a Spanish Ministry of Economy and Competitiveness grant (PSI2014-53427-P) and a Fundación Séneca grant (19267/PI/14); L.L.D.S. is currently supported by the Ramón y Cajal fellowship program (RYC-2015-17483); C.D.-P. is currently supported by the CEIMAR program (CEIMAR2018-2); C.D.-P. and L.L.D.S. are supported by a Santander Bank—CEMIX UGR-MADOC grant (Project PINS 2018-15)Resumen
The functional validity of the signal obtained with low-cost electroencephalography (EEG)
devices is still under debate. Here, we have conducted an in-depth comparison of the EEG-recordings
obtained with a medical-grade golden-cup electrodes ambulatory device, the SOMNOwatch +
EEG-6, vs those obtained with a consumer-grade, single dry electrode low-cost device, the NeuroSky
MindWave, one of the most a ordable devices currently available. We recorded EEG signals at Fp1
using the two di erent devices simultaneously on 21 participants who underwent two experimental
phases: a 12-minute resting state task (alternating two cycles of closed/open eyes periods), followed by
60-minute virtual-driving task. We evaluated the EEG recording quality by comparing the similarity
between the temporal data series, their spectra, their signal-to-noise ratio, the reliability of EEG
measurements (comparing the closed eyes periods), as well as their blink detection rate. We found
substantial agreement between signals: whereas, qualitatively, the NeuroSky MindWave presented
higher levels of noise and a biphasic shape of blinks, the similarity metric indicated that signals from
both recording devices were significantly correlated. While the NeuroSky MindWave was less reliable,
both devices had a similar blink detection rate. Overall, the NeuroSky MindWave is noise-limited,
but provides stable recordings even through long periods of time. Furthermore, its data would be of
adequate quality compared to that of conventional wet electrode EEG devices, except for a potential
calibration error and spectral differences at low frequencies.