Cohen's d in post-hoc test

Discuss the jamovi platform, possible improvements, etc.

by Vicente_inefo » Fri Oct 25, 2019 8:15 pm

Hi,

I have performed a mixed 2x2 ANOVA and I noticed that the post-hoc test does not report the effect size. Is there any possibility to implement it?

On the other hand, if JAMOVI computes Cohen's d by the formula d = t/sqrt(n), it would be correct to compute Cohen's d by using the t value reported by JAMOVI and the n value of the respective group?

Please, see the attached file for more details

I accept any other suggestion, thanks in advance
Attachments
Captura de pantalla 2019-10-25 a las 22.12.43.png
Post-hoc test table
Captura de pantalla 2019-10-25 a las 22.12.43.png (115.35 KiB) Viewed 143 times
Vicente_inefo
 
Posts: 3
Joined: Wed May 29, 2019 11:39 pm

by jonathon » Sat Oct 26, 2019 10:23 pm

hi,

the issue is that the post-hoc tests in jamovi are based on the estimated marginal means, rather than simply being pairwise comparisons of the raw data. so calculating cohen's d for these is a bit more complicated ... i *think* it's possible to calculate cohen's d for emmeans, but even then i'm not completely sure.

i've asked a few people about it, and i'll see what they come back with.

cheers
User avatar
jonathon
 
Posts: 965
Joined: Fri Jan 27, 2017 10:04 am

by Vicente_inefo » Mon Oct 28, 2019 11:53 am

Thank you very much, I will remain attentive to your response
Vicente_inefo
 
Posts: 3
Joined: Wed May 29, 2019 11:39 pm


Return to General