PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

A gaze independent spelling based on rapid serial visual presentation.
Laura Acqualagna and Benjamin Blankertz
In: Engineering in Medicine and Biology Society,EMBC, 2011 Annual International Conference of the IEEE, 30 Aug-3 Sept 2011, Boston, MA.


An event-related potential (ERP) speller is a brain computer interface (BCI) based on the detection on ERPs that can be used as spelling device for those people deprived of other means of communication. In the present online study we investigated in twelve participants the performance of an ERP speller based on the rapid serial visual presentation paradigm (RSVP). Three variants of the RSVP speller have been investigated regarding chromaticism and speed of stimulus presentation. All the subjects were able to successfully operate the RSVP speller and high mean symbol selection accuracies were reached in all conditions, (93.6% to 94.8%). Offline analysis revealed a possible mean spelling speed of about 2 symb/min for an optimized number of stimulus sequences. The RSVP speller is intuitive to use and it is gaze independent, which makes it suitable for patients with deterioration of oculomotor control.

EPrint Type:Conference or Workshop Item (Talk)
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Brain Computer Interfaces
ID Code:9419
Deposited By:Benjamin Blankertz
Deposited On:16 March 2012