Fig. 3
From: Remote collection of electrophysiological data with brain wearables: opportunities and challenges
Example of a P300 event-related potential collected from an oddball task. The X axis shows the time in seconds with 0 s coinciding with stimuli presentation (dotted line). Y axis shows the EEG signal amplitude in microvolts. Blue and orange lines represent an average of EEG waves evoked by rarely occurring target stimuli (e.g. visual or auditory cue) and an average of EEG waves evoked by commonly occurring standard stimuli, respectively. Observing differences between the target and standard data reveals two characteristic waveforms, a positive spike at 300 ms (P300) preceded by a negative spike at approximately 200 ms (N200)