*2.1. Participants*

Twenty-nine healthy, right-handed volunteers took part in the present investigation (13 males and 16 females). They were students at the University of Milano-Bicocca (mean schooling: 16.62 years, SD = 2.03) with an average age of 25 years (mean age: 25.10, SD = 4.96). Each volunteer reported no history of drug abuse or neurological illness, and had normal or corrected-to-normal vision. The right-handedness was assessed using the Italian version of the Edinburgh Handedness Inventory (mean index score: 0.79, SD = 0.17). The experiments were conducted with the understanding and the written consent of each volunteer. The study was conducted in accordance with the Declaration of Helsinki, and the protocol was approved by the Ethics Committee of the University of Milano-Bicocca (protocol number 0000273/14).
