Dear AFNI experts,
I’m trying to analyze data from 17 subject using 3dMVM. Brain activity was estimated using TENT basis functions (8 basis functions). I have 2 additional within subjects factors: Condition (Neutral, Negative), and Delay (Short, Medium, Long). This means 17 * 8 * 2 * 3 = 816 response values.
When I run the analysis, 3dMVM correctly reports the contingency tables and succesfully reads input files.
Unfortunately, then the program seems to take an infinite time to perform the analysis. I waited for 8 hours but it stood still, without reporting the analysis of the first slice.
May this be related to the quite large number of response values? Is there something wrong in my code? (see below)
Useful informations: I run AFNI on “virtual” Ubuntu (through VirtualBox). The virtual machine has 4 processors (of 8 total in my PC), and 8 GB RAM (of 12). So it is not a particularly slow machine, and was in fact able to perform many analysis using AFNI.
These are the first lines of the script:
-gltLabel 1 ‘Negative’ -gltCode 1 ‘Condition : 1Negative’
-gltLabel 2 ‘Neutral’ -gltCode 2 'Condition : 1Neutral’
-gltLabel 3 ‘Neg-Neu’ -gltCode 3 ‘Condition : 1Negative -1Neutral’
Subj Condition Delay Time InputFile
s1 Neutral Short t1 …/subjF1/Decon/bucket+tlrc’’
s1 Neutral Short t2 …/subjF1/Decon/bucket+tlrc’’
Thanks in advance,