ICASSO


ICASSO toolbox is used in GIFT to determine the reliability of ICA algorithm. ICA algorithm is run several times to determine the algorithmic reliability or stability. Reliable estimates correspond to tight clusters and un-reliable ones do not point to any cluster. Figure 1 will open when you click on Utilities drop down box and select "ICASSO". The parameters in the figure are as follows: ICASSO results are written to a MAT file with suffix '_icasso_results.mat'. This MAT file contains the following variables: We use centroid of the cluster for each component instead of the average of the individual ICA runs as it is more stable. After the ICASSO step is completed, subsequent group ICA analysis steps like Back Reconstruction, Scaling Components and Group Stats are run.

Figure 1: GUI for running ICASSO.