Hi Donald,
Thanks for your quickly reply. It really helps.
Best
Han
2009/9/7 MCLAREN, Donald <[log in to unmask]>:
> No, you can't remove the blocks because of the hemodynamic response running
> into the 'control task' blocks. What should be done is to model the 'control
> task' with a separate regressor. You can still compare the 'interested task'
> to 'fixation' and ignore the 'control task'. It is just important that you
> model the two task conditions in the GLM even if you only want to compare
> one of them to the fixation period.
>
> On Sun, Sep 6, 2009 at 8:53 PM, han zhang <[log in to unmask]> wrote:
>>
>> Hi SPMers,
>>
>> I met a puzzling problem in task activation analysis using SPM5. The
>> experiment design is mainly in the sequence
>> with blocks like:
>>
>> ' interested task --> fixation --> control task --> interested task
>> --> fixation --> control task --> ....'
>>
>> My question is, before the data entering into GLM, can we simply
>> delete all the 'control task' blocks and
>> just analyze the rest blocks (i.e. interested task - fixation)?
>>
>> Thanks for your reply.
>>
>> Best
>>
>> Han
>
>
>
> --
> Best Regards, Donald McLaren
> =====================
> Support the Alzheimer's Association Memory Walk 2009 ~~~
> Join the Wisconsin Alzheimer's Disease Research Center team or make a
> donation.
> http://madison.kintera.org/2009/donaldmclaren
>
>
> =================
> D.G. McLaren
> University of Wisconsin - Madison
> Neuroscience Training Program
> Office: (608) 265-9672
> Lab: (608) 256-1901 ext 12914
> =====================
> This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED
> HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is
> intended only for the use of the individual or entity named above. If the
> reader of the e-mail is not the intended recipient or the employee or agent
> responsible for delivering it to the intended recipient, you are hereby
> notified that you are in possession of confidential and privileged
> information. Any unauthorized use, disclosure, copying or the taking of any
> action in reliance on the contents of this information is strictly
> prohibited and may be unlawful. If you have received this e-mail
> unintentionally, please immediately notify the sender via telephone at (608)
> 265-9672 or email.
>
--
Han ZHANG
State's Key Laboratory of Cognitive Neuroscience and Learning
Institute of Cognitive Neuroscience and Learning, Beijing Normal University
19# Xinjiekouwai St. 100875,
Beijing, P.R. CHINA
|