Double ErrP Detection for Automatic Error Correction in an ERP-Based BCI Speller

Brain-computer interface (BCI) is a useful device for people with severe motor disabilities. However, due to its low speed and low reliability, BCI still has a very limited application in daily real-world tasks. This paper proposes a P300-based BCI speller combined with a double error-related potent...

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Veröffentlicht in:IEEE transactions on neural systems and rehabilitation engineering Jg. 26; H. 1; S. 26 - 36
Hauptverfasser: Cruz, Aniana, Pires, Gabriel, Nunes, Urbano J.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States IEEE 01.01.2018
Schlagworte:
Adult
Algorithms
automatic error correction
brain-computer interface (BCI)
Brain-Computer Interfaces - classification
Calibration
Communication Aids for Disabled
Double error-related potentials (ErrP)
Electric potential
electroencephalogram (EEG)
Electroencephalography
Electroencephalography - classification
Equipment Design
Error correction
Event-Related Potentials, P300 - physiology
Feedback, Psychological
Female
Healthy Volunteers
Humans
Male
Online Systems
P300 ERP
Reliability
Reproducibility of Results
speller
Young Adult
ISSN:1534-4320, 1558-0210, 1558-0210
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Zusammenfassung:Brain-computer interface (BCI) is a useful device for people with severe motor disabilities. However, due to its low speed and low reliability, BCI still has a very limited application in daily real-world tasks. This paper proposes a P300-based BCI speller combined with a double error-related potential (ErrP) detection to automatically correct erroneous decisions. This novel approach introduces a second error detection to infer whether wrong automatic correction also elicits a second ErrP. Thus, two single-trial responses, instead of one, contribute to the final selection, improving the reliability of error detection. Moreover, to increase error detection, the evoked potential detected as target by the P300 classifier is combined with the evoked error potential at a feature-level. Discriminable error and positive potentials (response to correct feedback) were clearly identified. The proposed approach was tested on nine healthy participants and one tetraplegic participant. The online average accuracy for the first and second ErrPs were 88.4% and 84.8%, respectively. With automatic correction, we achieved an improvement around 5% achieving 89.9% in spelling accuracy for an effective 2.92 symbols/min. The proposed approach revealed that double ErrP detection can improve the reliability and speed of BCI systems.
Bibliographie:ObjectType-Article-1
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ObjectType-Feature-2
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ISSN:1534-4320
1558-0210
1558-0210
DOI:10.1109/TNSRE.2017.2755018