Participants.

Eighteen participants were recruited. Four subjects were rejected from the analyses because of excessive artefacts in their EEG. For the fourteen remaining participants (8 males and 6 females between 18 and 30 years old, with a mean of 25 years old), instrumental instruction varied between 5 and 25 years, with a mean of 12.2, a standard deviation of 5.5, and a median of 12.