Skip to content

AFNI/NIfTI Server

Sections
Personal tools
You are here: Home » AFNI » Community » Message Board
 

History of AFNI updates   Suggested reading for beginners   Add yourself to the AFNI map!

 New Topic  |  Go to Top  |  Go to Topic  |  Search   Previous Message  |  Next Message 
 Re: about '-contr' in 3dANOVA
Author: rick reynolds (---.nimh.nih.gov)
Date:   10-27-09 16:18

Hi Pengmin,

It depends on what you want for the null hypothesis of the
contrast. As '1 -1 -1' the NH would be that the resopnse to
stimulus S1 equals the sum of stimuli S2 and S3. As '2 -1 -1'
it would be that S1 equals the average of S2 and S3.

The latter case is more typical, comparing S1 to the average
of S2 and S3. Note that in this case the contrast might be
written as '1 -0.5 -0.5', which is more precisely a comparison
with the average.

---

Doesn't 3dANOVA output FDR curves for -contr lines? I would
expect you to see the q-values in the afni GUI when that t-stat
sub-brick is chosen for the threshold.

- rick
 Reply To This Message  |  Flat View   Newer Topic  |  Older Topic 

 Topics Author  Date
 about '-contr' in 3dANOVA  new
Pengmin 10-27-09 15:44 
 Re: about '-contr' in 3dANOVA  
rick reynolds 10-27-09 16:18 
 Re: about '-contr' in 3dANOVA  new
Pengmin 10-27-09 17:59 
 Re: about '-contr' in 3dANOVA  new
rick reynolds 10-27-09 18:18 
 Re: about '-contr' in 3dANOVA  
Pengmin 10-28-09 00:06 
 Re: about '-contr' in 3dANOVA  new
rick reynolds 10-28-09 09:47 
 Re: about '-contr' in 3dANOVA  new
Pengmin 10-29-09 23:04 
 Re: about '-contr' in 3dANOVA  new
rick reynolds 10-30-09 09:20 
 Re: about '-contr' in 3dANOVA  new
Pengmin 10-30-09 10:43 
 Re: about '-contr' in 3dANOVA  new
Gang Chen 10-28-09 17:51 
 Re: about '-contr' in 3dANOVA  new
pengmin 10-28-09 18:48 
 Re: about '-contr' in 3dANOVA  new
Gang Chen 10-28-09 19:02 
 Re: about '-contr' in 3dANOVA  new
Pengmin 10-29-09 09:02 
 Re: about '-contr' in 3dANOVA  new
Gang Chen 10-29-09 13:59 
 Re: about '-contr' in 3dANOVA  new
Pengmin 10-29-09 20:50 
 Re: about '-contr' in 3dANOVA  new
pengmin 10-28-09 19:01 


 New Topic  |  Go to Top  |  Go to Topic  |  Search 
 Reply To This Message
 Your Name:
 Your E-mail:
 Subject:
 Attachment:
 Attachment:
   
Powered by Plone

phorum.org

This site conforms to the following standards: