The test asked what the participants thought of some music,
Then the participants were told (informed) of what other people (critics) thought of the music,
And then the participants were asked to rate the music again.
* what rating system was involved? A simple like/dislike? Or an actual set of music critiquing questions? Such as volume, tones, rhythms, expressional, tension/release, rise/fall, scratchiness, clarity, etc (I dunno what music critics actuall attend to when critiquing music)
* had the participants experienced the expert critiquing method before? Were the participants familiar with critquing music themselves in this way? Or was it first introduced to them via this test?