How the Statistical Validation of Functional Connectivity Patterns Can Prevent Erroneous Definition of Small-World Properties of a Brain Connectivity Network

Figure 7

Scatterplot of small-worldness clustering coefficient ((a) and (c)) and small- worldness versus path length ((b) and (d)) for each iteration of the adjacency matrix extraction process computed by means of shuffling procedures (first row) and fixed edge density method (second row) for edge densities correspondent to those achieved in Case 2 (edge density as in Figure 5(b)). The line represents the linear fitting computed on the data. The associated values of correlation (𝑟) and 𝑟-square (𝑟²) were reported in the boxes.