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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2012 Jul 25;51(9):902–910. doi: 10.1016/j.jaac.2012.06.019

FIGURE 2.

FIGURE 2

Grand Averages of Electroencephalogram Recordings in Youth with Non-Tic-Related Obsessive-Compulsive Disorder (OCD), Youth with Tic-Related OCD, and Healthy Control Subjects. Note: The images depict response-locked grand average waveforms recorded at electrode Cz for correct and incorrect responses. Responses occurred at 0 msec. The mean amplitude of the error-related negativity (ERN) was computed in a window from 0 to 80 msec following incorrect response trials.