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Hello FSLers, I'm setting up a GLM that uses parametric modulation for the first time and would appreciate confirmation that I am on the right track. My task involves 3 working memory load conditions (blocked), as well as instruction blocks and a resting (blank screen) baseline. It's my understanding that I should model three regressors: EV1: instruction cue condition (no parametric modulation; 3rd column of input text file = 1) EV2: working memory condition w/no parametric modulation (3rd column of input text file = 1; no discrimination between 3 WM loads and all WM events modeled together) EV3: working memory condition w/parametric modulation; (3rd column of input text file = mean-centered WM load) I then create the following contrast to estimate the modulation of WM on activation: 0 0 1 Is this setup is appropriate? Many thanks in advance, Lara