Single-trial event-related potential analysis for brain-computer interfaces

Nicoletta Nicolaou, Slawomir J. Nasuto, J. Georgiou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Different types of mental activity are utilised as an input in Brain-Computer Interface (BCI) systems. One such activity type is based on Event-Related Potentials (ERPs). The characteristics of ERPs are not visible in single-trials, thus averaging over a number of trials is necessary before the signals become usable. An improvement in ERP-based BCI operation and system usability could be obtained if the use of single-trial ERP data was possible. The method of Independent Component Analysis (ICA) can be utilised to separate single-trial recordings of ERP data into components that correspond to ERP characteristics, background electroencephalogram (EEG) activity and other components with non-cerebral origin. Choice of specific components and their use to reconstruct "denoised" single-trial data could improve the signal quality, thus allowing the successful use of single-trial data without the need for averaging. This paper assesses single-trial ERP signals reconstructed using a selection of estimated components from the application of ICA on the raw ERP data. Signal improvement is measured using Contrast-To-Noise measures. It was found that such analysis improves the signal quality in all single-trials.

Original languageEnglish
Title of host publicationAISB 2008 Convention
Subtitle of host publicationCommunication, Interaction and Social Intelligence - Proceedings of the AISB 2008 Symposium on Brain Computer Interfaces and Human Computer Interaction: A Convergence of Ideas
Pages13-19
Number of pages7
Volume5
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventAISB 2008 Symposium on Brain Computer Interfaces and Human Computer Interaction: A Convergence of Ideas - Aberdeen, United Kingdom
Duration: 1 Apr 20084 Apr 2008

Conference

ConferenceAISB 2008 Symposium on Brain Computer Interfaces and Human Computer Interaction: A Convergence of Ideas
CountryUnited Kingdom
CityAberdeen
Period1/04/084/04/08

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  • Cite this

    Nicolaou, N., Nasuto, S. J., & Georgiou, J. (2008). Single-trial event-related potential analysis for brain-computer interfaces. In AISB 2008 Convention: Communication, Interaction and Social Intelligence - Proceedings of the AISB 2008 Symposium on Brain Computer Interfaces and Human Computer Interaction: A Convergence of Ideas (Vol. 5, pp. 13-19)