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Mean (black) and individual (gray) pleasantness ratings of chords by the control (A) and amusic (B) groups. Ratings of each subject were z-scored before analysis to remove coarse differences in the use of the rating scale, as in ref. 8. Intervals contained two notes separated by an integer number of semitones; triads (major, minor, diminished, and augmented) contained three notes. Here and elsewhere, error bars denote one SE.
