FIGURE 4.

Hierarchical clustering of Euclidean distance matrices for each group. Modules for all groups were determined using a tree‐cut height of 50%. Colours on the sides of the graphs indicate where the modules are. In male water drinkers, seven modules were identified (A). In male non‐frontloaders, three modules were identified (B). In male frontloaders, three modules were identified (C). The decreased modularity in male alcohol drinking groups (i.e., non‐frontloaders and frontloaders) is observed regardless of tree cut percentage height chosen (with the exception of extreme cut off values) (D). In female water drinkers, five modules were identified (D). In female frontloaders, nine modules were identified (E). The increased modularity in frontloaders is observed regardless of tree cut percentage height chosen (with the exception of extreme cut off values) (D).