Five Shades of Grey: Exploring Quintary m-Sequences for More User-Friendly c-VEP-Based BCIs

Figure 6

Online results for the binary and quintary m-sequences. All 18 participants spelt the word POWERFUL with different flickering speeds. (a) Accuracies and (b) information transfer rates (ITRs) for the 60 Hz, 120 Hz, and 240 Hz refresh rate setups are shown. The dashed lines indicate the mean values across all participants.

(a)

(b)