Comparison of Classification Methods for P300 Brain-Computer Interface on Disabled Subjects

• Published in: Computational Intelligence and Neuroscience Vol. 2011; no. 2011; pp. 160 - 171
• Main Authors: Manyakov, Nikolay V., Chumerin, Nikolay, Combaz, Adrien, Van Hulle, Marc M.
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Limiteds 01.01.2011; Hindawi Puplishing Corporation; Hindawi Publishing Corporation; John Wiley & Sons, Inc
• Subjects: Adult; Aged; Amyotrophic Lateral Sclerosis - physiopathology; Amyotrophic Lateral Sclerosis - rehabilitation; Communication Disorders - etiology; Communication Disorders - physiopathology; Communication Disorders - rehabilitation; Disabled persons; Disabled Persons - rehabilitation; Electroencephalography - methods; Event-Related Potentials, P300 - physiology; Female; Humans; Infarction, Middle Cerebral Artery - physiopathology; Infarction, Middle Cerebral Artery - rehabilitation; Male; Middle Aged; Motor ability; Movement Disorders - etiology; Movement Disorders - physiopathology; Movement Disorders - rehabilitation; Neurofeedback - methods; Neurofeedback - physiology; Physiological aspects; Speech; Subarachnoid Hemorrhage - physiopathology; Subarachnoid Hemorrhage - rehabilitation; User interface; User-Computer Interface; Belgium
• ISSN: 1687-5265; 1687-5273; 1687-5273
• DOI: 10.1155/2011/519868

We report on tests with a mind typing paradigm based on a P300 brain-computer interface (BCI) on a group of amyotrophic lateral sclerosis (ALS), middle cerebral artery (MCA) stroke, and subarachnoid hemorrhage (SAH) patients, suffering from motor and speech disabilities. We investigate the achieved typing accuracy given the individual patient's disorder, and how it correlates with the type of classifier used. We considered 7 types of classifiers, linear as well as nonlinear ones, and found that, overall, one type of linear classifier yielded a higher classification accuracy. In addition to the selection of the classifier, we also suggest and discuss a number of recommendations to be considered when building a P300-based typing system for disabled subjects.