Figure 6. Boxplots showing the normalised mutual information (NMI) for the different encodings, compared to human clustering (A).

The panels show ART clustering (left), k-means clustering (middle) and hierarchical clustering (right), using the different proximity metrics. Each box shows the 25^th and 75^th centiles, with the median indicated as a red line. Whiskers show the extreme values (±2.7σ) using the Matlab boxplot function. Letters indicate Tukey HSD post-hoc tests at the p<0.05 level, following ANOVA.