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Memorias de investigación
Communications at congresses:
Feedback effect analysis by comparison of discrimination capability of On-line and Off-line experimental procedures based on LDA
Year:2009
Research Areas
  • Automatic
Information
Abstract
This paper analyzes the user¿s feedback influence in the mental task discrimination capability through the comparison of results obtained from Off-line and On-line Brain Computer Interface experimental procedures. Experiments performed under these two paradigms were carried out by five male volunteers. In order to develop a wearable BCI device only two electrodes in C3 and C4 zones have been used for electroencephalographic signal acquisition. These procedures apply seven different types of preprocessing windows and Linear Discrimination Analysis technique to reduce the dimension of the feature space before the quantification of the discrimination capability between the proposed mental activities.The discrimination capability is quantified through statistical analysis, based on bilateral contrast test, between the population of the LDA transformed feature vectors. As conclusions from the results of these experiments are: 1. The user¿s feedback influence provokes a lower discrimination capability, but enough to be used in an On-line BCI device. 2. The use of LDA technique allows to reduce the dimensionality of the input feature space, meanwhile it is maintained the discrimination capability between the proposed mental tasks. 3. The Tukey¿s and rectangular preprocessing windows improve the discrimination capability.
International
Si
Congress
International Conference on Biomedical Electronics and Devices
960
Place
Oporto Portugal
Reviewers
Si
ISBN/ISSN
978-989-8111-64-7
Start Date
14/01/2009
End Date
17/01/2009
From page
186
To page
192
Proceedings of the International Conference on Biomedical Electronics and Devices
Participants
  • Participante: Jose Luis Matinez Perez ( )
  • Autor: Antonio Barrientos Cruz (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Robótica y Cibernética
  • Centro o Instituto I+D+i: Centro de Automática y Robótica (CAR). Centro Mixto UPM-CSIC
  • Departamento: Automática, Ingeniería Electrónica e Informática Industrial
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