I disagree. You don't tell them anything and you don't need to tell them anything about the violins. All the need to know is pick the violin under whatever methodology they have set forth.

Double-blind testing does not add ANY bias from the researcher to its subjects and the subjects need not know anything what the researcher is trying "to prove" and that is precisely what the researcher did in this case.



I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne