EEG Recording and Online Signal Processing on Android: A Multiapp Framework for Brain-Computer Interfaces on Smartphone

Figure 7

Feedback-related negativity. (a) Single subject topographic maps, plotted as the mean activity in the 250 to 300 ms time interval. Color bar as shown in (b) applies. (b) Group mean FRN at the frontocentral ROI, which is indicated as white circle in the topographic maps in (a). Black trace refers to the difference wave, blue trace to the correct condition, and red trace to the incorrect condition. Topographic map inset shows the group mean FRN topography.

(a) Single subject FRN maps

(b) FRN at ROI and group FRN