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Reaction times for correct match responses (A,C) and non-match responses (B,D) in the expression task (i.e., participants responded to the emotional expression of faces). Presented are reaction times under 1-back load (A,B) and those under 2-back load (C,D). Error bars represent SEM. ***p < 0.001, **p < 0.01, *p < 0.05.
