Figure 2. Activation maps obtained using cross-correlation analysis (CC), ICA_cat and ICA_avg (|z|>2.5).

In general, ICA provides greater contrast (in terms of z-score) between activated and non-activated brain regions. Compared with ICA_cat, ICA_avg provides greater functional specificity and contrast. The results are consistent across subjects and sessions. These maps correspond to nIC estimated using the bootstrap stability analysis approach (nIC  =  (9.8±1.2)).