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Dear Sien, I have a question on the option of 'covariate' in the 'multiple regression' > design in the 2nd level. There are two places for 'covariate', one under > 'multiple regression', the other one is at the same level. I am interested > in > how the brain image is correlated with age and bmi, so I put the two > variables > in as covariates. However, when I put them in the covariates under > 'multiple > regression' or outside the 'multiple regression', or one under and one > outside, > they produced same results. Is it supposed to be like this or did I > something > wrong? > In recent versions of SPM (including SPM8), there is no difference between putting the covariate in or outside of the multiple regression—so it's good that you've gotten the same results. :) Best regards, Jonathan