Overlap of the top 50 spectral features. The total number of overlapping features found between the lists of the top 50 most perturbed spectral features from each of the 8 participants, as a function of the number of groups they were found in. There were no features found to be shared by all 8 lists. When 4 lists were considered, 3 negative mode features were found to be shared. Overall there was far more overlap in the negative mode lists, with a total of 15 features shared by any combination of 3 lists, and 27 features by any combination of 2 lists. Only 1 feature was found to be shared by any 3 lists in the positive mode, and 13 features found to be shared by any combination of 2 lists.