We are using MELODIC to conduct group ICA. We have two groups of subjects: one group of English speakers and one group of Japanese speakers. We hope to run ICA for both groups and examine group differences.
Our questions are about the way of doing the group ICA: Shall we conduct tensor-ICA for two groups separately? Or shall we combine the two groups together and run a large T-ICA?
If we conduct the tensor-ICA for two groups separately, what output can be used to conduct contrast analysis (e.g. T-test)?
If we run a large T-ICA, shall we run the contrast analysis on the subject/session mode for some "best-fit" ICs? Then how to generate the spatial maps for each group and the maps for the contrast results?
Thanks very much for the help.