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Hi Rosalia,

With 2 groups and 2 measurements/levels per subject, this is a repeated measures design. For within-subject effects and for interactions, the design you need is this:
https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/GLM#ANOVA:_2-groups.2C_2-levels_per_subject_.282-way_Mixed_Effect_ANOVA.29

There is also a coded example at the link below, that includes a separate design for between-subject effects.
https://s3-us-west-2.amazonaws.com/andersonwinkler/mailinglist/design_ekaterina.ods

All the best,

Anderson


On 8 February 2018 at 14:22, Rosalia Dacosta Aguayo <[log in to unmask]> wrote:
Hi Liam and FSL's experts,
​
​I would much appreciate if you could tell me if the following design is fine taking into account I have two groups of 6 participants every one with pre-post scanners and I would like to see if there are differences between the groups along the time and if there is any interaction.
Best,
Rosie


2018-02-07 15:17 GMT+01:00 Rosalia Dacosta Aguayo <[log in to unmask]>:
Hi Liam,

I see, thank you very much for your help.
Best regards,
Rosalia

2018-02-07 15:10 GMT+01:00 Nestor, Liam J <[log in to unmask]>:

I think this might suit your data better Rosalia:

 

https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/GLM#ANOVA:_2-factors_2-levels_.282-way_between-subjects_ANOVA.29

 

Liam.

 

From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Rosalia Dacosta Aguayo
Sent: 07 February 2018 13:34
To: [log in to unmask]
Subject: [FSL] ANOVA 2 factors 2 levels (repeated measures) or ANOVA 2*2?

 

Dear FSL experts,

 

I have two group of participants that have been scanned in two different time points (basal, post-treatment).

 

 

I wonder if this design would be the best (adapting it to my case):

 

ANOVA: 1-factor 4-levels (Repeated Measures)  --> ANOVA 2-factor 2-levels?

Best regards,

Rosalia