Hi Clare,
On 08/10/2012 06:19 AM, Gibbard, Clare wrote:
Hello,
I went on the FS course in Amsterdam recently. I have run a QDEC analysis to see whether cortical thickness differs between my two groups. I have two questions:
- I put in the lh_bankssts_thickness as my continuous variable. The
display outputs results for whether average thickness differs between my groups. The significant clusters appear in areas which are far away from the lh_bankssts. Is this correct? Does the design somehow look at overall cortical thickness in the lh even though I have only specified the lh_bankssts?
I think it is correct. You are not confining the analysis to bankssts. You are basically using bankssts as a nuisance variable.
- I can't see the button for controlling for multiple comparisons.
From the wiki I believe this is supposed to appear under a scalar heading, but I can't see it. Do I need to add something in order to do this?
You should not need anything else. Are you on the "Display" tab? It should be under the "Clusters" area.
doug
Thank you very much.
Best wishes, Clare
Clare Gibbard
PhD Student
Imaging & BioPhysics Unit
4th Floor
Institute of Child Health
30 Guilford Street
London
WC1N 1EH
Tel. 020 7905 2192
Email: c.gibbard@ucl.ac.uk
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