Fig. 1.

(a) The configuration of the fNIRS channel assembly was based on the 10-20 system. Pairs of optodes were placed to maximize left hemisphere coverage. (b) To compute a “fingerprint matrix”, the Pearson correlation was calculated between each individual connectivity matrix from one period database (e.g rest 1) with all the other connectivity matrices from the database representing another period (e.g rest 2 or task). Thus, row represent the target connectome and column the predictor. In other words, each pixel (i,j) represent the correlation of a connectome i of one participant from one database (e.g., rest 1) with connectome j of any given participant from the other database (e.g., rest 2), and a correct individual identification corresponds to a maximal correlation coefficient at the diagonal. Accuracy can be determined by the total number of correct identifications divided by the number of participants.