-Joanna
On Thu, Jun 16, 2011 at 9:42 AM, Jeanette Mumford
<[log in to unmask]> wrote:
Hi,
Even with 3 inputs you don't really have enough data to calculate a variance. It is pretty much standard to use a fixed effects model for combining runs at the second level and then FLAME for the group analysis (3rd level).
JeanetteOn Thu, Jun 16, 2011 at 6:44 AM, Joanna Marie Chango
<[log in to unmask]> wrote:
well we have three inputs (one cope for run one and two different copes from run two). I don't know if that changes anything?? I'll have to check out the variance once I get into work later today.
-Joanna
On Thu, Jun 16, 2011 at 2:22 AM, Stephen Smith
<[log in to unmask]> wrote:
You can't have a mixed-effects model of two inputs. What is the variance!?
Steve.
On 16 Jun 2011, at 01:15, Joanna Marie Chango wrote:
Hi Stephen,
It is mixed effects.
-Joanna
On Wed, Jun 15, 2011 at 5:42 PM, Stephen Smith
<[log in to unmask]> wrote:
Was this mixed effects or fixed effects?
--------------------
Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington,
Oxford. OX3 9 DU, UK
----------------------
Has anyone ever had trouble with level two analyses using only two runs? When we run level two using a contrast of run1 and run 2, we are getting nothing (i.e., brain regions are blank when there should be activity there). Any suggestions or insights would be appreciated!
Thanks,
Joanna
--
Joanna M. Chango, M.A.
Graduate Student, Clinical Psychology
University of Virginia
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Joanna M. Chango, M.A.
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University of Virginia
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(434) 982-5583http://people.virginia.edu/~psykliff/Teenresearch/Joanna.html
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---------------------------------------------------------------------------
Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
---------------------------------------------------------------------------
--
Joanna M. Chango, M.A.
Graduate Student, Clinical Psychology
University of Virginia
P.O. Box 400400
Charlottesville, VA 22904-4400
(434) 982-5583
http://people.virginia.edu/~psykliff/Teenresearch/Joanna.htmlConfidentiality Notice: This e-mail communication and any
attachments may contain confidential and privileged
information for the use of the designated recipient(s)
named above. If you are not the intended recipient(s), you
are hereby notified that you have received this
communication in error and that any review, disclosure,
dissemination, distribution or copying of it or it's
contents is prohibited. If you have received this
communication in error, please notify me immediately by
replying to this message and deleting it from your
computer. Thank you.
--
Joanna M. Chango, M.A.
Graduate Student, Clinical Psychology
University of Virginia
P.O. Box 400400
Charlottesville, VA 22904-4400
(434) 982-5583
http://people.virginia.edu/~psykliff/Teenresearch/Joanna.htmlConfidentiality Notice: This e-mail communication and any
attachments may contain confidential and privileged
information for the use of the designated recipient(s)
named above. If you are not the intended recipient(s), you
are hereby notified that you have received this
communication in error and that any review, disclosure,
dissemination, distribution or copying of it or it's
contents is prohibited. If you have received this
communication in error, please notify me immediately by
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