Artificial Neural Networks and Machine Learning – ICANN 2011

Volume 6791 of the series Lecture Notes in Computer Science pp 26-35

1-Penalized Linear Mixed-Effects Models for BCI

  • Siamac FazliAffiliated withBerlin Institute of Technology
  • , Márton DanóczyAffiliated withBerlin Institute of Technology
  • , Jürg SchelldorferAffiliated withETH Zürich
  • , Klaus-Robert MüllerAffiliated withBerlin Institute of Technology

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A recently proposed novel statistical model estimates population effects and individual variability between subgroups simultaneously, by extending Lasso methods. We apply this ℓ1-penalized linear regression mixed-effects model to a large scale real world problem: by exploiting a large set of brain computer interface data we are able to obtain a subject-independent classifier that compares favorably with prior zero-training algorithms. This unifying model inherently compensates shifts in the input space attributed to the individuality of a subject. In particular we are now able to differentiate within-subject and between-subject variability. A deeper understanding both of the underlying statistical and physiological structure of the data is gained.