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. 2008 May 9;39(1):77–86. doi: 10.1017/S0033291708003437

Fig. 1.

Fig. 1

Ratings of perceived (a) controllability, (b) helplessness and (c) magnitudes (μV) of the post-imperative negative variation (PINV) at the midline frontal recording site (Fz) during the experimental protocol for depressed (●, n=26) and healthy (◆, n=24) subjects.