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MICA-MNI / BrainStat

A statistics and context decoding toolbox for neuroimaging.
https://brainstat.readthedocs.io
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How to calulate Cohen's d by BrainStat #345

Closed qiruizhangqirui closed 9 months ago

qiruizhangqirui commented 10 months ago

Hi! Effect sizes have become increasingly important in recent research, especially since effect sizes for various diseases are also available in the ENIGMA toolbox. However, I found that Cohen's d are not provided in Surfstat or Brainstat. There is a slm.ef in Surfstat, but it doesn't seem to be Cohen's d. I noticed that in Ke Xie's latest TLE gradient article Cohen's d is reported and claimed to have been calculated using BrainStat. Is there any way I can calculate Cohen's d value manually from slm struct? Thanks, Qirui Zhang

saratheriver commented 9 months ago

Hello,

Please read here on how to compute Cohen's d effect sizes: https://statisticsbyjim.com/basics/cohens-d/.

You simply need the means of each group and the pooled SD.

Hope this helps -