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

TY - GEN

T1 - A comparative study of pseudorandom sequences used in a c-VEP based BCI for online wheelchair control

AU - Isaksen, Jonas

AU - Mohebbi, Ali

AU - Puthusserypady, Sadasivan

N1 - Conference code: 38

PY - 2016/10/13

Y1 - 2016/10/13

N2 - 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 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 Goldcode 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.

AB - 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 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 Goldcode 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.

U2 - 10.1109/EMBC.2016.7590997

DO - 10.1109/EMBC.2016.7590997

M3 - Article in proceedings

C2 - 28324945

SP - 1512

EP - 1515

BT - 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

PB - IEEE

T2 - Annual International Conference of the Engineering in Medicine and Biology Society

Y2 - 16 August 2016 through 20 August 2016

ER -