Boxplot showing the normalized distribution of SSD values for undisturbed galaxies (green), JType = 1 (purple), JType = 2 (red), JType = 3 (cyan) and gravitationally interacting galaxies (blue). Each point corresponds to the SSD measure of an individual galaxy. A minor shift was applied in the x axis for clarity. The box sizes represent the interquartile range (25%–75%) for each galaxy type, while the whiskers indicate the 10%–90% range of each distribution.