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Hello FreeSurfer Developers,
I am performing a GLM analysis to assess cortical thickness between 4 groups, without any covariates. I followed exactly what is on the wiki https://secure-web.cisco.com/1VuhMA49mKmIDKH_rGPy4c67MdbjL6bNv2i_WwNDwvMA5-M...
In a previous analysis (https://secure-web.cisco.com/1qw-8Oc7vg0Tc3_ilXhnADw1_lWmUuUCQVr-MNNAiNRRR1O...), Dr Douglas had told me that before any analysis I should test whether the interaction is significant or not.
I would like to know if this also applies to this case, the interaction being tested by contrast number 7 of the wiki.
Thanks in advance!
Best, Laura Willers de Souza
Master Student in Biochemistry
Zimmer Lab - Federal University of Rio Grande do Sul
- Porto Alegre/RS - Brazil