Supporting information for Blood and Zatorre (2001) Proc. Natl. Acad. Sci. USA 98 (20), 11818–11823. (10.1073/pnas.191355898)

Regressions were also performed for subject ratings of pleasantness/unpleasantness (Table 3) and emotional intensity (Table 4), for comparison with the chills intensity regression. Because both subject-selected and control music conditions produced some level of emotional intensity or pleasantness, the distribution of ratings was closer to a normal distribution. The regressions were performed in the same way as for chills intensity ratings, including subtraction of a subject effect regressor (see Methods).