you can't in QDEC. You'll have to use the command line stream doug

On 07/29/2014 10:43 AM, Jon Alan Wieser wrote:

HI freesurfer experts,

I am running a qdec analysis, my first factor has 3 levels, my other 2 factors have 2 levels, I select my first and second factors and hit "Analyze"

I get the error  :

Error in Analyze: command failed

ERROR: QdecGlmDesign::GenerateContrasts: factor 1 must have 2 levels

how can I analyze with a factor that has three levels?

thanks

JOn

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