Towards a Framework Based on Single Trial Connectivity for Enhancing Knowledge Discovery in BCI

• Published in: Active Media Technology pp. 658 - 667
• Main Authors: Billinger, Martin, Brunner, Clemens, Scherer, Reinhold, Holzinger, Andreas, Müller-Putz, Gernot R.
• Format: Book Chapter
• Language: English
• Published: Berlin, Heidelberg Springer Berlin Heidelberg 2012
• Series: Lecture Notes in Computer Science
• Subjects: band power; brain-computer interface; coherence; connectivity; directed transfer function; knowledge discovery
• ISBN: 9783642352355; 3642352359
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-642-35236-2_65

We developed a framework for systematic evaluation of BCI systems. This framework is intended to compare features extracted from a variety of spectral measures related to functional connectivity, effective connectivity, or instantaneous power. Different measures are treated in a consistent manner, allowing fair comparison within a repeated measures design. We applied the framework to BCI data from 14 subjects recorded on two days each, and demonstrated the framework’s feasibility by confirming results from the literature. Furthermore, we could show that electrode selection becomes more focal in the second BCI session, but classification accuracy stays unchanged.