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

Author

Scherer, Reinhold ; Müller, Gernot R. ; Neuper, Christa ; Graimann, Bernhard ; Pfurtscheller, Gert

Author_Institution

Graz Univ. of Technol., Austria

Volume

51

Issue

6

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

979

Lastpage

984

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 σ, the number of correctly spelled letters/min, up to σ=3.38 (average σ=1.99).

Keywords

electroencephalography; handicapped aids; spelling aids; virtual reality; asynchronously controlled EEG-based virtual keyboard; asynchronously controlled three-class brain-computer interface-based spelling device; brain-computer communication; information transfer rate; motor imagery; spelling rate improvements; Bioelectric phenomena; Biomedical informatics; Birth disorders; Brain computer interfaces; Communication aids; Communication channels; Communication system control; Electroencephalography; Humans; Keyboards; Algorithms; Brain; Cerebral Cortex; Communication Aids for Disabled; Computer Peripherals; Electroencephalography; Evoked Potentials; Humans; Information Storage and Retrieval; Online Systems; Reproducibility of Results; Sensitivity and Specificity; User-Computer Interface; Word Processing;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2004.827062

Filename

1300792