Figure 4.

Block structure of full similarity matrix (FSM) based upon our example with 3 subjects and 2 sets of subject-level components (RE, a set of ICs produced after two ICA decompositions). In this example, each block shows similarity between 2 pairs of REs from the same subject or two different subjects. Also, RE 11-31 indicates inter-subject similarity between RE 1 of subject 1 and RE 1 of subject 3. The first digit in 11 is an index to the subject whereas the second is an index to the RE. Solid colored, on the diagonal blocks indicate similarity within the components of a subject or intra-subject similarity whereas off diagonal ones indicate that between the components of two different subjects.