how to calculate SE in the post hoc of ANOVA

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by Nat » Sun Mar 21, 2021 6:23 am

Hi all, may I know how jamovi calculates SE in the post hoc test?

First of all, I know jamovi using pooled variance.

I run independent anova, and in this case, post hoc table can provide Cohen's d for each pair of comparison. (seems no such option for repeated-measures ANOVA)
I manually calculated standard deviation by using pooled variance, and I use each pair of mean difference, divided it by my manually calculated standard deviation, I can get the corresponding Cohen's d as showed in the post hoc table.
However, I can't get the SE by using my manually calculated standard deviation...

So can I know how jamovi calculates SE in the post hoc test?

Many thanks!
Nat
 
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by jonathon » Sun Mar 21, 2021 6:40 am

hi,

all this is handled by the emmeans R package, so you'd need to look at how that does it.

cheers

jonathon
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jonathon
 
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by Nat » Sun Mar 21, 2021 6:46 am

I see, thanks Jonathon!
Nat
 
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