Mean ratings (standard deviations) on the visual analog scales in the emotional prosody task (onomatopoeias) for early PD patient in the ON and OFF DRT conditions, advanced PD patients, and HC.

Abbreviations: Happi.: Happiness; HC: healthy controls; PD: Parkinson's disease; DRT: dopamine replacement therapy; Sad.: Sadness; SD: standard deviation; Surpr.: Surprise.* Significant if p** significant if p#Significant if p##significant if p†Significant if p††significant if p