Fig. 3.

Hierarchical clustering results. The optimal number of clusters is given by the maximal effect size (Cohen's d for repeated measures; N = 470) of the difference between the within-cluster and between-cluster connectivity strengths (i.e., the partial correlation between area pairs as shown in Fig. S1). The red ‘x’ in the right panel indicates the corresponding effect-size (N = 470; all within-stream versus all between-stream connections, both session days combined) for the area-to-stream assignments based on their anatomical locations (see Fig. 2), which, except for area lTO2, were identical to the optimal hierarchical clustering results (k = 3; left panel).