Performances Evaluation and Optimization of Brain Computer Interface Systems in a Copy Spelling Task

The evaluation of the performances of brain-computer interface (BCI) systems could be difficult as a standard procedure does not exist. In fact, every research team creates its own experimental protocol (different input signals, different trial structure, different output devices, etc.) and this mak...

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Bibliographic Details
Published in:IEEE transactions on neural systems and rehabilitation engineering 2007-06, Vol.15 (2), p.207-216
Main Authors: Bianchi, Luigi, Quitadamo, Lucia Rita, Garreffa, Girolamo, Cardarilli, Gian Carlo, Marciani, Maria Grazia
Format: Article
Language:English
Subjects:
Algorithms
Assistive communication
Biological control systems
Brain - physiology
Brain computer interfaces
Brain Mapping - methods
brain-computer interface (BCI)
Cognition - physiology
Communication Aids for Disabled
Communication system control
efficiency
Electroencephalography - methods
Electrooculography
Feature extraction
Humans
Man-Machine Systems
Neuroscience
optimization
Performance evaluation
Protocols
Task Performance and Analysis
Transducers
US Department of Transportation
User-Computer Interface
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Summary:The evaluation of the performances of brain-computer interface (BCI) systems could be difficult as a standard procedure does not exist. In fact, every research team creates its own experimental protocol (different input signals, different trial structure, different output devices, etc.) and this makes systems comparison difficult. Moreover, the great question is whether these experiments can be extrapolated to real world applications or not. To overcome some intrinsic limitations of the most used criteria a new efficiency indicator will be described and used. Its main advantages are that it can predict with a high accuracy the performances of a whole system, a fact that can be used to successfully improve its behavior. Finally, simulations were performed to illustrate that the best system is built by tuning the transducer (TR) and the control interface (CI), which are the two main components of a BCI system, so that the best TR and the best CI do not exist but just the best combination of them.
ISSN:1534-4320
1558-0210
DOI:10.1109/TNSRE.2007.897024