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Authors: Jonatan Tidare ; Elaine Åstrand and Martin Ekström

Affiliation: Mälardalen University, Sweden

Keyword(s): EEG, Closed-loop, LabVIEW, System Latency.

Abstract: Neurofeedback in real-time has proven effective when subjects learn to control a BCI. To facilitate learning, a closed-loop feedback system should provide neurofeedback with maximal accuracy and minimal delay. In this article, we propose a modular system for real-time neurofeedback experiments and evaluate its performance as a function of increased stress level applied to the system. The system shows stable behavior and decent performance when streaming with many EEG channels (36-72) and 500-5000 Hz, which is common in BCI setups. With very low data loads (1 channel, 500-1000 Hz) the performance dropped significantly and the system became highly unpredictable. We show that the system delays did not correlate linearly with the stress-level applied to the system, emphasizing the importance of system delay tests before conducting real-time BCI-experiments.

CC BY-NC-ND 4.0

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Paper citation in several formats:
Tidare, J.; Åstrand, E. and Ekström, M. (2018). Evaluation of Closed-loop Feedback System Delay. In Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018) - BIODEVICES; ISBN 978-989-758-277-6; ISSN 2184-4305, SciTePress, pages 187-193. DOI: 10.5220/0006598301870193

@conference{biodevices18,
author={Jonatan Tidare. and Elaine Åstrand. and Martin Ekström.},
title={Evaluation of Closed-loop Feedback System Delay},
booktitle={Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018) - BIODEVICES},
year={2018},
pages={187-193},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006598301870193},
isbn={978-989-758-277-6},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018) - BIODEVICES
TI - Evaluation of Closed-loop Feedback System Delay
SN - 978-989-758-277-6
IS - 2184-4305
AU - Tidare, J.
AU - Åstrand, E.
AU - Ekström, M.
PY - 2018
SP - 187
EP - 193
DO - 10.5220/0006598301870193
PB - SciTePress

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