Hutchins tested non-musicians with at least seven years of experience, requiring them to reproduce synthesised vocal tones, produced by a computer. First, they were asked to match the note using a slider, a simple device in which a sliding button changes the pitch of a sound, like sliding a finger up and down a guitar string. Both groups eventually were able to make the match, suggesting perception was not the problem. “People were hearing the right notes,” explains Hutchins. “While the trained musicians were quicker, all of the participants could accurately match the notes.” But when they were asked to use their own voices to match the note, non-musicians were only fifty nine percent successful of the time. Hutchins suspected that error correction