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Emotions recognition accuracy. Medicated Parkinson's disease (PD) patients (n = 13) compared with three healthy control (HC) groups: (1) average age and gender (male/female) ratio matched (AGM) group (n = 12); (2) 60 years old or older (n = 14), and; (3) younger than 60 years old (n = 15). Error bars represent standard error of the mean (SEM). *p < 0.05 (t-test) statistical significant difference between the PD patients and each of the tested healthy control groups.
