Gang Chen's Home Page
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Mathematical Statistician
Contact Info: E-mail: gangchen@mail.nih.gov; Phone: 301-594-9193
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Statistical Analysis in R
Connectivity Analysis
- Correlation analysis (aka functional connectivity)
- Context-dependent correlation (aka psychophysiological interaction analysis)
- Causal relation analysis (aka effective connectivity)
- Structural equation modeling (SEM) or path analysis (2007 HBM poster at Chicago)
- Granger causality Analysis: 3dGC and 1dGC
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Some issues in FMRI analysis
- How to set up contrast weights for trend analysis
- How to construct matrices for main effects and interactions in individual subject analysis with 3dDeconvolve
- How to check model fitting in individual subject analysis
- Basics of group analysis
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Statistical Calculators
Matlab Package for Individual and Group Analyses
This Matlab package is developed under versions 6.5.1 (R13) and 7.0.4 (R14) with Statistical Toolbox (Versions 4.1 and 5.0.2). It comes with the AFNI package, and should be found under your AFNI source code directory, like .../AFNI/src/matlab/. You can also downlowd it as a standalone software from the following link, but try to avoid multiple copies of the files if possible.
- How to download the Matlab script files (updated August 16, 2005)
- How to run ANOVA
- Group analysis with unbalanced designs
- Acknowledgements
Thanks go to the following people who in their unique ways have helped me develop this Matlab package during its birth labor or during its growth with less bugs: Bob Cox, Donald Burrill, Ziad Saad, Rich Hammett, Alex Clark, Jiong-Jiong Yang, Jed Meltzer, Lukas Pezawas, Anders H. Andersen
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