DPABI/DPABISurf/DPARSF

best fit model analysis

Submitted by Ham on

Dear dpabiers, 

Could please recommend me the best approach with the next pilot study..

It's a prepost treatment study, with 2 time points (pre&post) but I've a huge lack of power due to size group ( 3 groups, 5 sujbects each)... 

so, I do not know if I can perform an ANCOVA Repeated measures and introduce the 3 groups or go further and apply a flexible factorial or GLM_Flex scripts...

Another approach, which it could be less conservative,,, is apply paired t-tests for pre&post group and for between group comparisons perform simple 2tests...

Dpabi/ICC

Submitted by Jason on

Hello, 

I have caculated Reho of seven participants who took twice scan a week apart, and then i want to caculate the test-retest reliablity with Dpabi using ANOVA model. In the GUI frame, I put seven data, smREHO, which were taken in the first time, into Rate-1 Images, and the other data into the Rate-2 Images, and then clicked Compute button. But, when the icc was all zero.  You can see how I put the data in the following pictures.