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Thank you Doug,
that was exactly the question...
it may be a trivial one but I have been messing aroung with several effects size calculation for a while and just wanted to make sure. So negative contrast (-1), negative beta.mgh, positive (?) gamma.mgh, and negative pcc.mgh withing the same significant cluster?
Thanks!!!
nicola
On 09/13/2018 07:39 PM, Douglas N. Greve wrote:
not sure what your question is. The pcc should have the same sign as the contrast.
On 09/13/2018 12:20 PM, Nicola Toschi wrote:
External Email - Use CautionHi List,
a dimple question about using partial correlation (pcc.mgh) as effect size measure. I am running multivariate regression and setting positive and negative contrasts one variable at a time, e.g. a design matrix with columns like
Intercept Age Gender Fact1 Fact2 ....
and a bunch of contrasts like
0 0 0 1 0
0 0 0 -1 0
Now let's say the second contrast gives me a significant results after MC correction in a certain cluster, what sign should i expect in PCC in that cluster (on average)?
Thank you very much in advance,
Nicola
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