sdm-help-list > Formula to calculate variance of Hedge's d
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Sep 14, 2017 08:09 AM | Chao-Gan YAN
Formula to calculate variance of Hedge's d
Dear Dr. Radua,
In your method, you used Hedge's d (or g*). You mentioned to look at your papers for how the T values were converted to Hedge's d and its variance. However, I can not find it in your papers.
Could you kindly point me the formulas to calculate Hedge's d (or g*) and its variance.
Furthermore, to combining across studies, did you use DerSimonian and Laird approach?
Thanks,
Chao-Gan
--
Chao-Gan YAN, Ph.D.
Principal Investigator
Deputy Director, Magnetic Resonance Imaging Research Center
Institute of Psychology, Chinese Academy of Sciences
16 Lincui Road, Chaoyang District, Beijing 100101, China
-
Initiator
DPABI, DPARSF, PRN and The R-fMRI Network (RFMRI.ORG)
http://rfmri.org/yan
http://scholar.google.com/citations?user...
In your method, you used Hedge's d (or g*). You mentioned to look at your papers for how the T values were converted to Hedge's d and its variance. However, I can not find it in your papers.
Could you kindly point me the formulas to calculate Hedge's d (or g*) and its variance.
Furthermore, to combining across studies, did you use DerSimonian and Laird approach?
Thanks,
Chao-Gan
--
Chao-Gan YAN, Ph.D.
Principal Investigator
Deputy Director, Magnetic Resonance Imaging Research Center
Institute of Psychology, Chinese Academy of Sciences
16 Lincui Road, Chaoyang District, Beijing 100101, China
-
Initiator
DPABI, DPARSF, PRN and The R-fMRI Network (RFMRI.ORG)
http://rfmri.org/yan
http://scholar.google.com/citations?user...
Oct 11, 2017 02:10 PM | Joaquim Radua
RE: Formula to calculate variance of Hedges d
Dear Chao-Gan,
you can find these formulas here: https://cran.r-project.org/web/packages/...
And yes, we use the DerSimonian and Laird approach.
With the best wishes,
Joaquim
you can find these formulas here: https://cran.r-project.org/web/packages/...
And yes, we use the DerSimonian and Laird approach.
With the best wishes,
Joaquim