Abstract
BCI spellers are mainly composed of an interface, by which alphanumerical characters are presented to users, and a classification system, which identifies the target character online by using the acquired EEG data. In this study, we proposed modifications both to the graphical user interface and to the classification system of the SSVEP-based speller, in order to improve the usability of the Bremen-BCI and to consequently increase the information transfer rate (ITR). The performances of writing three phrases (including every letter of the alphabet at least once) using the standard Bremen-BCI speller and the proposed dictionary-driven SSVEP speller with a modified interface were compared with each other. Seven subjects, in copy spelling mode, used a conventional speller and an improved BCI speller incorporating a custom-built dictionary with a mean ITR of 29.98±5.79 bit/min and of 32.71±9.18 bit/min, respectively. For the vast majority of users, this new dictionary-driven BCI realization resulted in a significant increase in spelling performance.
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References
Wolpaw, J., Birbaumer, N., McFarland, D., Pfurtscheller, G., Vaughan, T.: Brain-computer interfaces for communication and control. Clin. Neurophysiol. 113, 767–791 (2002)
Vialatte, F.B., Maurice, M., Dauwels, J., Cichocki, A.: Steady-state visually evoked potentials: Focus on essential paradigms and future perspectives. Prog. Neurobiol. 90, 418–438 (2010)
Felton, E., Lewis, N., Wills, S., Radwin, R., Williams, J.: Neural signal based control of the dasher writing system. In: 3rd International IEEE/EMBS Conference on CNE 2007, pp. 366–370 (May 2007)
Ahi, S.T., Kambara, H., Koike, Y.: A Dictionary-Driven P300 Speller With a Modified Interface. IEEE Trans. Neural Syst. Rehab. Eng. 19(99), 6–14 (2010)
Ryan, D.B., Frye, G.E., Townsend, G., Berry, D.R., Mesa, G.S., Gates, N.A., Sellers, E.W.: Predictive spelling with a P300-based brain-computer interface: Increasing the rate of communication. Hum. Comput. Interact. 27(1), 69–84 (2011)
Volosyak, I., Cecotti, H., Gräser, A.: Optimal visual stimuli on LCD screens for SSVEP based Brain-Computer Interfaces. In: Proc. 4th Int. IEEE/EMBS Conference on Neural Engineering NER 2009, pp. 447–450 ( May 2009)
Volosyak, I., Cecotti, H., Gräser, A.: Impact of frequency selection on LCD screens for SSVEP based brain-computer interfaces. In: Cabestany, J., Sandoval, F., Prieto, A., Corchado, J.M. (eds.) IWANN 2009. LNCS, vol. 5517, pp. 706–713. Springer, Heidelberg (2009)
Volosyak, I.: SSVEP-based Bremen-BCI– boosting information transfer rates. J. Neural Eng. (in press, 2011)
Cecotti, H., Volosyak, I., Gräser, A.: Evaluation of an SSVEP based Brain-Computer Interface on the command and application levels. In: Proc. 4th Int. IEEE/EMBS Conference on Neural Engineering NER 2009, pp. 474–477 (May 2009)
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Volosyak, I., Moor, A., Gräser, A. (2011). A Dictionary-Driven SSVEP Speller with a Modified Graphical User Interface. In: Cabestany, J., Rojas, I., Joya, G. (eds) Advances in Computational Intelligence. IWANN 2011. Lecture Notes in Computer Science, vol 6691. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21501-8_44
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DOI: https://doi.org/10.1007/978-3-642-21501-8_44
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