F. Aloise, P. Aricò, F. Schettini, A. Riccio, M. Risetti, S. Salinari, D. Mattia, F. Babiloni, F. Cincotti


Brain Computer Interface (BCI) is an alternative communication system which allows users to send commands and/or messages toward the outside not crossing the normal output channels of the brain, but conveying these outputs from the human brain to a computer (Wolpaw et al., 2002). In an EEG-based BCI messages are obtained from brain activity. This study presents a novel P300 based Brain Computer Interface requiring no eye gaze, and so usable in covert attention status, called GeoSpell (Geometric Speller). GeoSpell performances have been compared with those obtained by the subjects with the standard 6 by 6 P300 Speller (P3Speller) matrix which depends on eye gaze (Farwell and Donchin, 1988). A NASA Task Load Index (TLX) workload assessment was employed to provide a subjective rating about the task’s workload and satisfaction with respect to both the interfaces (NASA Human Performance Research Group 1987). Results shown comparable workload values for P3Speller and Geospell; this result has an important impact in term of efficiency and satisfaction for the use of the BCI devices. Geospell interface has shown an accuracy comparable with the P3Speller one but with a lower bit-rate.


  1. Allison, B. Z. & Pineda, J. A., 2003. ERPs evoked by different matrix sizes: implications for a brain computer interface (BCI) system. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 11(2), pp.110-113.
  2. Anderson, J., 1999. Cognitive Psychology and its Implications Fifth Edition., Worth Publishers.
  3. Brunner, P. et al., 2010. Does the 'P30078 speller depend on eye-gaze? Journal of Neural Engineering, 7(5), p.056013.
  4. Fabiani, M. et al., 1987. Definition, identification and reliability of measurement of the P300 component of the event-related brain potential. , 2, pp.1-78.
  5. Farwell, L. A. & Donchin, E., 1988. Talking off the top of your head: toward a mental prosthesis utilizing eventrelated brain potentials. Electroencephalography and Clinical Neurophysiology, 70(6), pp.510-523.
  6. Hart, S. G. & Staveland, L. E., 1988. Development of NASA-TLX (Task Load Index): Results of Empirical and Theoretical Research. In Human Mental Workload. North-Holland, pp. 139-183.
  7. Krusienski, D. J. et al., 2006. A comparison of classification techniques for the P300 Speller. Journal of Neural Engineering, 3(4), pp.299-305.
  8. Kübler, A. et al., 2006. BCI Meeting 2005--workshop on clinical issues and applications. IEEE Transactions on Neural Systems and Rehabilitation Engineering: A Publication of the IEEE Engineering in Medicine and Biology Society, 14(2), pp.131-134.
  9. Lutz, A. et al., 2009. Mental training enhances attentional stability: neural and behavioral evidence. The Journal of Neuroscience: The Official Journal of the Society for Neuroscience, 29(42), pp.13418-13427.
  10. Polich, J. & Kok, A., 1995. Cognitive and biological determinants of P300: an integrative review. Biological Psychology, 41(2), pp.103-146.
  11. Raymond, J. E., Shapiro, K. L. & Arnell, K. M., 1992. Temporary suppression of visual processing in an RSVP task: an attentional blink? Journal of Experimental Psychology. Human Perception and Performance, 18(3), pp.849-860.
  12. San Agustin, J. et al., 2010. Evaluation of a low-cost opensource gaze tracker. In Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications - ETRA 7810. the 2010 Symposium.Austin, Texas, p. 77.
  13. Schalk, G. et al., 2004. BCI2000: a general-purpose braincomputer interface (BCI) system. IEEE Transactions on Bio-Medical Engineering, 51(6), pp.1034-1043.
  14. Sutter, E., 1992.The brain response interface: communication through visually-induced electrical brain responses. J. Microcomput. Appl., 15(1), pp.31- 45.
  15. Treder, M. S. & Blankertz, B., 2010. (C)overt attention and visual speller design in an ERP-based braincomputer interface. Behavioral and Brain Functions: BBF, 6, p.28.
  16. Wolpaw, J. R. et al., 2002. Brain-computer interfaces for communication and control. Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology, 113(6), pp.767-91.

Paper Citation

in Harvard Style

Aloise F., Aricò P., Schettini F., Riccio A., Risetti M., Salinari S., Mattia D., Babiloni F. and Cincotti F. (2011). A NEW P300 NO EYE-GAZE BASED INTERFACE: GEOSPELL . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011) ISBN 978-989-8425-35-5, pages 227-232. DOI: 10.5220/0003161202270232

in Bibtex Style

author={F. Aloise and P. Aricò and F. Schettini and A. Riccio and M. Risetti and S. Salinari and D. Mattia and F. Babiloni and F. Cincotti},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)},

in EndNote Style

JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)
SN - 978-989-8425-35-5
AU - Aloise F.
AU - Aricò P.
AU - Schettini F.
AU - Riccio A.
AU - Risetti M.
AU - Salinari S.
AU - Mattia D.
AU - Babiloni F.
AU - Cincotti F.
PY - 2011
SP - 227
EP - 232
DO - 10.5220/0003161202270232