Objective and Subjective Evaluation of Online Error Correction during P300-Based Spelling
Grand average EEG event-related dynamics for group with a high specificity in solid line () and group with a low specificity in dashed line (). (a) Responses to bad (grey) and good feedbacks (black) in channel Cz. (b) Difference of bad and good feedback responses in channel Cz. (c) Difference of target and non-target responses in channel P7.