An asynchronously controlled EEG-based virtual keyboard: improvement of the spelling rate

IEEE Trans Biomed Eng. 2004 Jun;51(6):979-84. doi: 10.1109/TBME.2004.827062.

Abstract

An improvement of the information transfer rate of brain-computer communication is necessary for the creation of more powerful and convenient applications. This paper presents an asynchronously controlled three-class brain-computer interface-based spelling device [virtual keyboard (VK)], operated by spontaneous electroencephalogram and modulated by motor imagery. Of the first results of three able-bodied subjects operating the VK, two were successful, showing an improvement of the spelling rate sigma, the number of correctly spelled letters/min, up to sigma = 3.38 (average sigma = 1.99).

Publication types

  • Clinical Trial
  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Algorithms*
  • Brain / physiology
  • Cerebral Cortex / physiology*
  • Communication Aids for Disabled*
  • Computer Peripherals*
  • Electroencephalography / methods*
  • Evoked Potentials / physiology
  • Humans
  • Information Storage and Retrieval / methods
  • Online Systems
  • Reproducibility of Results
  • Sensitivity and Specificity
  • User-Computer Interface*
  • Word Processing*