Dry andWater-Based EEG Electrodes in SSVEP-Based BCI Applications - Biomedical Engineering Systems and Technologies - page 17

Although the performance was lower than for conductive gel electrodes, dry and water-
based electrodes can ease the setup procedure, have the potential to reduce the setup
time with the proper design of dry and water-based headset and electrodes, and can fa-
cilitate the usage of the system without expert assistance. Therefore, in situations where
practical aspects of the EEG system are preferred over communication speed, dry and
water-based solutions can replace the gel ones. Having the advantage of greater prac-
ticality, we believe that with the advances in the water-based and dry electrode design,
improvements in the amplifier technology, and with the usage of more advanced signal
analysis methods, the signal quality and overall performance of water-based and dry
EEG systems could come quite close to the performance of the gel-based ones.
Acknowledgements. The research leading to these results has received funding from
the European Community Seventh Framework Programme under grant BRAIN,
n o 224156. The authors wish to thank Mark Jager and Tsvetomira Tsoneva for their
suggestions on improving the content of the paper. We also thank our colleagues who
participated in the experiment.
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