jamovi

Hi there.

I would like to start congratulating the jamovi team for the excellent software.

Working with my data in jamovi I found some weird p values resulted from the post hoc of the interaction of groups.

To compare, I ran the same results in SPSS and GraphPad Prism. The overall ANOVA results are ok, however, as I suspected, the results provided by jamovi on post hoc comparisons were wrong (SPSS and Prism presented the same p value between them). I tried all tests available (Tukey, Scheffe, Bonferroni and Holm), and all returned wrong values from jamovi.

Am I doing something wrong?

Please see attached the tables returned from SPSS and jamovi.


Looking forward for the team reply.

Thanks in advance.

hi,

i think this might be a case where the results are *different* rather than wrong. there's a strong case that spss does these in a sub-optimal way.

the post-hoc tests in jamovi are based on estimated marginal means, you can read more about them here:

https://cran.r-project.org/web/packages ... asics.html

cheers

jonathon

Hi Jonathon.

Thank you very much for your reply.
You are totally right. The results are different and not wrong... I believe my english limitations did not help me on that.

I will study a little bit more about the estimated marginal means.

Best regards.