Beyond P300: an auditory ERP paradigm with sequential stimulation

Abstract

Event Abstract Back to Event Beyond P300: an auditory ERP paradigm with sequential stimulation Johannes Hoehne1* and Michael Tangermann2 1 Berlin Institute of Technology, Neurotechnology, Germany 2 University of Freiburg, Germany 1. Research Background: Brain-computer interfaces (BCIs) aim to establish communication channels which are independent of muscle movements, relying on the real-time analysis of brain signals instead. Typically, BCI paradigms which evaluate evoked potentials in the EEG follow the principles of the oddball paradigm with random sequences of target and non-target stimuli. We investigate whether this randomness can be removed, allowing a very user-friendly paradigm where the user knows the order of stimulation. 2. Methods We performed an EEG study with 10 subjects. The subjects listened to a rapid sequence (SOA=83,3ms) of 30 auditory stimuli with the task to attend to only one stimulus/letter. The spoken alphabet with each letter lasting 250 ms was used as stimuli, which were presented either in a pseudorandom order (condition 1) or in a sequential order (condition 2). 3. Results Despite the rapid stimulation sequence, we found that the oddball paradigm (condition 1) elicited typical class-discriminative ERP components, such as N200 and P300. The evoked potentials in the sequential condition also showed class discriminant features, such that the EEG signature from attended stimuli was different from non-attended stimuli. However Figure 1 depicts that the ERPs from the sequential condition were clearly distinct from those components observed in the oddball condition, since they were lacking N200 and P300 components. 4. Conclusions Striving for the simplest-possible setup, we describe that one can also remove any randomness from an ERP-based BCI paradigm, by presenting 30 characters which are presented in a fix sequential order. We find that this paradigm - called CharStreamer - also elicits class discriminant EEG features which were however different to an oddball paradigm as they were lacking N200 and P300 components. Keywords: Auditory Perception, EEG, ERP, Brain-Computer Interfacing, oddball, Sequential stimuli, non-randomly ordered stimulation Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Cognition and Executive Processes Citation: Hoehne J and Tangermann M (2015). Beyond P300: an auditory ERP paradigm with sequential stimulation. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00163 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Mr. Johannes Hoehne, Berlin Institute of Technology, Neurotechnology, Berlin, Germany, j.hoehne@tu-berlin.de Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Johannes Hoehne Michael Tangermann Google Johannes Hoehne Michael Tangermann Google Scholar Johannes Hoehne Michael Tangermann PubMed Johannes Hoehne Michael Tangermann Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.