Reliability and between participant similarity for the various methods used to correct for physiological noise. (A) Reliability of the age‐connectivity matrices. (B) Reliability of each participants connectivity matrix. (C) Similarity between age‐matched participants. (D) Reliability of individual differences in connectivity strength, averaged across all within network connections. (E) Reliability of individual differences in connectivity strength, averaged across all between network connections. (F) Reliability of individual differences in connectivity strength averaged across all connections within each of the functional networks. (G) Scatterplot of individual differences in mean connectivity in relation to age for different pre‐processing steps. This was not shown for the mean regression steps, because mean regression removes all variations in mean connectivity. N = only motion regressors; C = motion regressors + CSF regressors; CW= motion regressors + CSF regressors + white matter regressors; CC = motion regressors +CompCor CSF and WM regressors. SMN = somato‐motor network (SMN), DAN = dorsal attention network, VAN = ventral attention network, FEN = fronto‐executive network, FPCN = fronto‐parietal control network, DMN= default mode network, Ant = anterior, Inf.=inferior.