calculation of statistics

Hi Matthew,

I'm just wondering if you can clarify something for me?

For simplcitiy sake, let me start with the T-stat. What does Marsbar divide the mean beta/weighted sum beta by to get the t-stat. It doesn't appear to be the standard error of the betas. From looking at the MarsS structure, it seems like it might be extracting info from the ResMS file associated with the SPM.mat file of the design, but what exactly and where can i find these figures/calulcations in the MarsS structure?

Similarly, should I use a a full factorial design, what is Marsbar using for the F-test?

Many thanks

Richard

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