A comparative study of pseudorandom sequences used in a c-VEP based BCI for online wheelchair control

Jonas Isaksen; Ali Mohebbi; Sadasivan Puthusserypady

doi:10.1109/EMBC.2016.7590997

A comparative study of pseudorandom sequences used in a c-VEP based BCI for online wheelchair control

Jonas Isaksen, Ali Mohebbi, Sadasivan Puthusserypady

Department of Biomedical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

4 Citations (Scopus)

Abstract

In this study, a c-VEP based BCI system was developed to run on three distinctive pseudorandom sequences, namely the m-code, the Gold-code, and the Barker-code. The Visual Evoked Potentials (VEPs) were provoked using these codes. In the online session, subjects controlled a LEGO(®) Mindstorms(®) robot around a fixed track. Choosing the optimal code proved a significant increase in accuracy (p<;0.00001) over the average performance. No single code proved significantly more accurate than the others (p=0.81), suggesting that the term "optimal code" is subject-dependent. However, the Gold-code was significantly faster than both alternatives (p=0.006, p=0.016). When choosing the optimal code for accuracy, no significant decrease in Time Per Identification (TPI) was found (p=0.67). Thus, when creating an online c-VEP based BCI system, it is recommended to use multiple random sequences for increased performance.

Original language	English
Title of host publication	38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Number of pages	4
Publisher	IEEE
Publication date	Aug 2016
Pages	1512-1515
DOIs	https://doi.org/10.1109/EMBC.2016.7590997
Publication status	Published - Aug 2016
Event	Annual International Conference of the Engineering in Medicine and Biology Society - Orlando, United States Duration: 16 Aug 2016 → 20 Aug 2016 Conference number: 38

Conference

Conference	Annual International Conference of the Engineering in Medicine and Biology Society
Number	38
Country/Territory	United States
City	Orlando
Period	16/08/2016 → 20/08/2016

Access to Document

10.1109/EMBC.2016.7590997

Cite this

A comparative study of pseudorandom sequences used in a c-VEP based BCI for online wheelchair control. / Isaksen, Jonas; Mohebbi, Ali; Puthusserypady, Sadasivan.

38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2016. p. 1512-1515.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Isaksen, J, Mohebbi, A & Puthusserypady, S 2016, A comparative study of pseudorandom sequences used in a c-VEP based BCI for online wheelchair control. in 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, pp. 1512-1515, Annual International Conference of the Engineering in Medicine and Biology Society , Orlando, Florida, United States, 16/08/2016. https://doi.org/10.1109/EMBC.2016.7590997

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