Just my two cents: I think the age should be mean-centered; otherwise, the meaning of the other variables need to be interpreted as age = 0 (rather than mean age = 0).
In general, I believe in qdec or mri_glmfit, the effects of Class variable are interpreted as 0 on the continuous/nuisance variables. Best, Daniel -- Yung-Jui "Daniel" Yang, PhD Postdoctoral Researcher Yale Child Study Center New Haven, CT (203) 737-5454 On 9/11/13 1:13 PM, "Erik Lindberg" <erikoloflindb...@gmail.com<mailto:erikoloflindb...@gmail.com>> wrote: Dear Douglas, attached you´ll find the two y.fsgd file from the analysis run in GLM_FIT. the results are completely different (the z-score converted age produces a believable result, while the result correcting with raw age scores seems completely wrong. best regards Olof
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