Driving a Semiautonomous Mobile Robotic Car Controlled by an SSVEP-Based BCI

Figure 5

(a) shows the second step of the Wizard. The subject faced a circle consisting of small segments which flickered simultaneously with seven different frequencies. Each of the seven tested frequencies was represented by the same amount of segments. The segments representing one of the seven tested frequencies were scattered in random order (b) forming the stimulation circle (a). After this multistimulation with thirteen or fourteen different frequencies, depending on the alpha test result, the EEG data were analyzed and ordered from the strongest to the lowest SSVEP response.

(a)

(b)