Figure 3

Dynamic process of unsupervised hierarchical clustering of the data averaged between 210–450 ms over the left hemisphere. For illustration, each base-level concept was assigned a sequential number from 1 to 16. Each column matrix represents the ad-hoc clustering at each pass. This process starts with 16 different vectors and ends with one collapsed cluster. Shaded cells highlight the online clustering of base-level concepts within one super-ordinate category. Note that after 12 passes, the clustering accurately reflects the superordinate categories for the controls (left), but not for the patient group (right).