Study of discriminant analysis applied to motor imagery bipolar data.

Journal Article (Clinical Trial;Journal Article)

We present a study of linear, quadratic and regularized discriminant analysis (RDA) applied to motor imagery data of three subjects. The aim of the work was to find out which classifier can separate better these two-class motor imagery data: linear, quadratic or some function in between the linear and quadratic solutions. Discriminant analysis methods were tested with two different feature extraction techniques, adaptive autoregressive parameters and logarithmic band power estimates, which are commonly used in brain-computer interface research. Differences in classification accuracy of the classifiers were found when using different amounts of data; if a small amount was available, the best classifier was linear discriminant analysis (LDA) and if enough data were available all three classifiers performed very similar. This suggests that the effort needed to find regularizing parameters for RDA can be avoided by using LDA.

Full Text

Duke Authors

Cited Authors

  • Vidaurre, C; Scherer, R; Cabeza, R; Schlögl, A; Pfurtscheller, G

Published Date

  • January 1, 2007

Published In

Volume / Issue

  • 45 / 1

Start / End Page

  • 61 - 68

PubMed ID

  • 17139517

Electronic International Standard Serial Number (EISSN)

  • 1741-0444

International Standard Serial Number (ISSN)

  • 0140-0118

Digital Object Identifier (DOI)

  • 10.1007/s11517-006-0122-5


  • eng