You can take the min of the two maps (mri_concat with --min option). For correcting for multiple comparisons, you can apply the simulations results to the resulting map (just make sure to use positive (pos) when running the simulation).
doug
Derek Huffman wrote:
Hello FreeSurfer Team,
I am in the process of running a between-groups analysis in FreeSurfer (Two groups: younger adults, older adults). We are analyzing areas of cortical thickness that are important for memory recall. I am able to perform between groups analysis in the QDEC that shows where the correlation between thickness and memory differs between the two groups, and we have found some promising results. The next step is to find areas of thickness that correlate with memory recall across both groups independently (as just looking at all subjects together could be driven by one group or the other). I am wondering if there is a way to find areas that show significant results for both groups, essentially finding an intersection point between the two groups where the correlation is significant for both.
Thank you,
Derek
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