CONF silviac04generative/IDIAP Generative Independent Component Analysis for EEG Classification Chiappa, Silvia Barber, David EXTERNAL http://publications.idiap.ch/attachments/reports/2005/silviac-esann05.pdf PUBLIC http://publications.idiap.ch/index.php/publications/showcite/silviac-rr04-77 Related documents European Symposium on Artificial Neural Networks ESANN 2005 IDIAP-RR 04-77 We present an application of Independent Component Analysis (ICA) to the discrimination of mental tasks for EEG-based Brain Computer Interface systems. ICA is most commonly used with EEG for artifact identification with little work on the use of ICA for direct discrimination of different types of EEG signals. By viewing ICA as a generative model, we can use Bayes' rule to form a classifier. This enables us also to investigate whether simple spatial information is sufficiently informative to produce state-of-the-art results when compared to more traditional methods based on using temporal features as inputs to off-the-shelf classifiers. Experiments conducted on two subjects suggest that knowing `where' activity is happening alone gives encouraging results. REPORT silviac-rr04-77/IDIAP EEG Classification using Generative Independent Component Analysis Chiappa, Silvia Barber, David EXTERNAL http://publications.idiap.ch/attachments/reports/2004/rr04-77.pdf PUBLIC Idiap-RR-77-2004 2004 IDIAP December 2004 Published in Neurocomputing 2006, volume 69, pages 769-777 We present an application of Independent Component Analysis (ICA) to the discrimination of mental tasks for EEG-based Brain Computer Interface systems. ICA is most commonly used with EEG for artifact identification with little work on the use of ICA for direct discrimination of different types of EEG signals. By viewing ICA as a generative model, we can use Bayes' rule to form a classifier. We fit spatial filters and source distribution parameters simultaneously and investigate whether these are sufficiently informative to produce good results when compared to more traditional methods based on using temporal features as inputs to off-the-shelf classifiers. Experiments suggest that state-of-the-art results may indeed be found without explicitly using temporal features. We extend the method to using a mixture of ICA models, consistent with the assumption that subjects may have more than one approach to thinking about a specific mental task.