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Main paradigm and behavioral results. (A) On each trial, subjects listened to a spoken statement and, 4 s later, classified it as true, false, or meaningless. (B) Performance in this task (% correct). (C and D) Mean d′ values for discrimination of meaningful versus meaningless statements (C) and, within meaningful statements, of true versus false statements (D). *P < 0.05 (Student t tests). Error bars represent one SEM.
