Question about Mixed effect analysis

严老师好, 

   我想请教下关于mixed effect analysis的问题。我想看下实验组和对照组治疗前后ALFF差异,做了mixed effect analysis, 其中interaction effect做出4个脑区。我又做了下每个组治疗前后各自的差异,实验组发现5个脑区,对照组发现7个脑区,这些脑区与之前的4个脑区不全相同。我的问题是,是否需要再单独做治疗前后配对样本t检验,还是重点放在interaction发现的4个脑区上就可以了?另外,mixe分析做出的group effect和condition effect意义是不是不大,是否还需要单独讨论?

   另外,提取时间序列时的“directory”应该选择预处理生成的那个文件夹呢?

   希望您能在百忙之中帮忙解答,谢谢您!

   祝好!

   米涛免

    

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cannot extract measures from sample matrices

I have read the GraphVar manual - it's all very clear. I want to get used to simply calculating and exporting graph measures using the Conn Matrix files in the sample workspace.  I have loaded just two of the files (to make it quicker) and chosen to calculate measures on the weighted matrices. I chose to extract the Weighted: Strength (UND) values. When I try to do this it just locks the screen and doesn't show anything else (i.e. progress bars). I don't receive any error messages. I have tried on other weighted measures and experience the same thing.

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The R-fMRI Wiki

The R-fMRI Wiki is designed to create a knowledge base for DPABI and DPARSF, and eventually for all the resting-state fMRI.

DPABI

DPABI is a GNU/GPL* toolbox for Data Processing & Analysis of Brain Imaging, evolved from DPARSF (Data Processing Assistant for Resting-State fMRI). DPABI is available at http://rfmri.org/dpabi.

DPARSF Advanced Edition

DPARSF Advanced Edition is the most commonly used version of DPARSF.

DPARSF

Data Processing Assistant for Resting-State fMRI (DPARSF) is a convenient plug-in software within DPABI, which is based on SPM.

Working Directory

Working Directory is a common concept within DPARSF.

In DPARSF, Working Directory means the upper directory of FunRaw/T1Raw/FunImg/T1Img etc. All the results will be generated under the Working Directory.

Subject List

Subject List is the list of subjects whose data needs to be processed.

After setting the Starting Directory Name at the bottom right of DPARSF, the program will read the directories under the Starting Directory (E.g., FunRaw or FunImg), and put them in to the Participants List field.

Time Points

Time Points is the number of time points (volumes) of the functional data. 

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