Dear SPMers,
I have a SPECT study that includes 29 Alzheimer's disease patients, 2
conditions (2 scans) and one covariate only. I've tried with this
model:
Multi-subj: conditions & covariates
but when I set up my contrast vector it seems to not work. What's wrong?
Could the problem be the fact that I have only one covariate with two
conditions? If not, what can I do?
I have also a PET study that includes 20 Alzheimer's disease patients, 1
condition (one scan each patient!) and different covariates. But every
model needs something more: if you have just one scan you need more than one
condition and if you have more than one condition you need as much
covariates as conditions (the same problem of my SPECT study).
Please, can you help me to find the best way to manage the data?
Best regards,
Michela
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Michela Canfora - Dipartimento di Fisica
Via Dodecaneso 33 - 16146 Genova, Italy
e-mail: [log in to unmask]
Phone: +39 010 353 6314
Fax: +39 010 311 066
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