Hi SPM experts, I have a quick question for you. I am analyzing a task that has 2 separate runs, and I have 2 separate 1st level spm.mat files for this. I don't want to have 2 separate 2nd level analyses for this 1 task. And I cant combine both runs in the 1st level because the design matrix becomes too long (too many conditions and regressors). Is there a way to average across the results from both 1st level spm.mat files in the 2nd level analysis?
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