A comparison of different dimensionality reduction and feature selection methods for single trial ERP detection
2010
Dimensionality reduction and feature selection is an important aspect of electroencephalography based event related potential detection systems such as brain computer interfaces. In our study, a predefined sequence of letters was presented to subjects in a Rapid Serial Visual Presentation (RSVP) paradigm. EEG data were collected and analyzed offline. A linear discriminant analysis (LDA) classifier was designed as the ERP (Event Related Potential) detector for its simplicity. Different dimensionality reduction and feature selection methods were applied and compared in a greedy wrapper framework. Experimental results showed that PCA with the first 10 principal components for each channel performed best and could be used in both online and offline systems.
Keywords:
- Dimensionality reduction
- Principal component analysis
- Feature selection
- Event-related potential
- Online and offline
- Linear discriminant analysis
- Computer science
- Feature extraction
- Machine learning
- Artificial intelligence
- Rapid serial visual presentation
- Pattern recognition
- Brain–computer interface
- Classifier (linguistics)
- Correction
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