Hi Prof. Greve, 

Thanks for the response and sorry for the confusion. I mean can we use dichotomous variables in the "Nuisance Factors" box of qdec? i.e., if we don't explicitly define them as categorical variables. I was thinking that if it's a GLM then it should be ok? 

We want to do this because we have more than one dichotomous variable that we want to control for. 

Many thanks, 
Dom

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Dom Dwyer, PhD
Psychiatry & Psychotherapy
LMU Munich

A: Nußbaumstr. 7, Munich, 80336
T: +49 (0)89 4400 55880

I'm not sure what you mean. Dichotomous variables can be used. Our tutorial has an example of using gender.
On 11/9/16 5:05 AM, Dominic Dwyer wrote:

Dear FS experts,


Sorry for my confusion here, but I'm wondering why dichotomous nuisance variables (e.g., gender) can't be used in qdec? I was thinking that if it uses a generalized linear model then it should be ok? I read other posts and understand why discrete factors can't be used with more than 2 levels, but was thinking that dichotomous variables should be different.
NB. we're trying to run a simple two group comparison, but we two dichotomous variables that we want to control for.
Many thanks for your help,
Dom

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*Dom Dwyer, PhD*
Psychiatry & Psychotherapy
LMU Munich

A: Nußbaumstr. 7, Munich, 80336

E: dominic.dw...@med.uni-muenchen.de <mailto:dominic.dw...@med.uni-muenchen.de>
T: +49 (0)89 4400 55880