TY - JOUR
T1 - Language-model assisted brain computer interface for typing
T2 - A comparison of matrix and rapid serial visual presentation
AU - Moghadamfalahi, Mohammad
AU - Orhan, Umut
AU - Akcakaya, Murat
AU - Nezamfar, Hooman
AU - Fried-Oken, Melanie
AU - Erdogmus, Deniz
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Noninvasive electroencephalography (EEG)-based brain-computer interfaces (BCIs) popularly utilize event-related potential (ERP) for intent detection. Specifically, for EEG-based BCI typing systems, different symbol presentation paradigms have been utilized to induce ERPs. In this manuscript, through an experimental study, we assess the speed, recorded signal quality, and system accuracy of a language-model-Assisted BCI typing system using three different presentation paradigms: A 4 7 matrix paradigm of a 28-character alphabet with row-column presentation (RCP) and single-character presentation (SCP), and rapid serial visual presentation (RSVP) of the same. Our analyses show that signal quality and classification accuracy are comparable between the two visual stimulus presentation paradigms. In addition, we observe that while the matrix-based paradigm can be generally employed with lower inter-Trial-interval (ITI) values, the best presentation paradigm and ITI value configuration is user dependent. This potentially warrants offering both presentation paradigms and variable ITI options to users of BCI typing systems.
AB - Noninvasive electroencephalography (EEG)-based brain-computer interfaces (BCIs) popularly utilize event-related potential (ERP) for intent detection. Specifically, for EEG-based BCI typing systems, different symbol presentation paradigms have been utilized to induce ERPs. In this manuscript, through an experimental study, we assess the speed, recorded signal quality, and system accuracy of a language-model-Assisted BCI typing system using three different presentation paradigms: A 4 7 matrix paradigm of a 28-character alphabet with row-column presentation (RCP) and single-character presentation (SCP), and rapid serial visual presentation (RSVP) of the same. Our analyses show that signal quality and classification accuracy are comparable between the two visual stimulus presentation paradigms. In addition, we observe that while the matrix-based paradigm can be generally employed with lower inter-Trial-interval (ITI) values, the best presentation paradigm and ITI value configuration is user dependent. This potentially warrants offering both presentation paradigms and variable ITI options to users of BCI typing systems.
KW - Brain-computer interface
KW - P300
KW - RSVP keyboard
KW - event-related potential
KW - matrix speller
UR - http://www.scopus.com/inward/record.url?scp=84949792551&partnerID=8YFLogxK
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U2 - 10.1109/TNSRE.2015.2411574
DO - 10.1109/TNSRE.2015.2411574
M3 - Article
C2 - 25775495
AN - SCOPUS:84949792551
SN - 1534-4320
VL - 23
SP - 910
EP - 920
JO - IEEE Transactions on Neural Systems and Rehabilitation Engineering
JF - IEEE Transactions on Neural Systems and Rehabilitation Engineering
IS - 5
M1 - 7058364
ER -