Table 2.

Silhouette value in each number of clusters.

#Clusters	2–3	4	5	6	7	8	9	10
spatial module	0	0.73a	0.64	0.57	0.53	0.51	0.50	0.51
temporal module	0	0.84a	0.81	0.76	0.73	0.71	0.70	0.70

The number of clusters for the spatial and temporal modules was defined as 4 based on the largest silhouette value.

^aIndicates the optimal number of clusters.