Forskning ved Københavns Universitet - Københavns Universitet


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

Publikation: Bidrag til bog/antologi/rapportKonferencebidrag i proceedingsForskningfagfællebedømt

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.

Titel38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Antal sider4
Publikationsdatoaug. 2016
StatusUdgivet - aug. 2016
BegivenhedAnnual International Conference of the Engineering in Medicine and Biology Society - Orlando, USA
Varighed: 16 aug. 201620 aug. 2016
Konferencens nummer: 38


KonferenceAnnual International Conference of the Engineering in Medicine and Biology Society

ID: 177087413