Jamovi free ware has a built-in interaction function (a product term) in linear regression procedure. Does anybody know if Jamovi automatically mean centres variables included in the product term?
Regards
I don't think so. But you can easily create centered variables:
"Computed variables can be added to the data set, with the ‘add’ button available on the data tab. This will produce a formula box where you can specify the formula. The usual arithmetic operators are available."
you could use X - VMEAN(X) to get a mean-centered variable, or Z(X) to get the z-scores (mean-centered and saled by the standard deviation).
I don't think so. But you can easily create centered variables:
"Computed variables can be added to the data set, with the ‘add’ button available on the data tab. This will produce a formula box where you can specify the formula. The usual arithmetic operators are available."
you could use X - VMEAN(X) to get a mean-centered variable, or Z(X) to get the z-scores (mean-centered and saled by the standard deviation).
I do believe that you have asked, and Jochen Wilhelm has answered the first jamovi question on ResearchGate. An encouraging sign!
Thanks, Ronan. We are using Jamovi as a a supplement to SPSS and STATA. For undergraduate students we change to Jamovi as it is most user friendly, but still communicates a sound logic. We also consider JASP but Jamovi seems slightly more flexible.
Ronán Michael Conroy, your precise observation of my activity scares me :)
Jamovi is based on R, so, to my opinion, it's a better "compromise" when doing stats then SPSS, Prism or spreadsheet software like Excel... It seems to make sense to me encouraging people to use it, as it might help to improve the understanding of stats and make the step towards R a bite easier.
Hence, once started, I may add another (hopefully useful) Jamovi hint: Jamovi has a forum, and this is probably a better place to ask Jamovi-specific questions:
https://forum.jamovi.org
Thanks, Jochen, I was not aware of the forum, I will try to use that for specific questions. Still hope we can compare stats software here.
"Still hope we can compare stats software here.… "
Sure we can :)
Despite my personal preference I think it's good and valuable (and absolutely required for development and improvement) to have alternatives and a spectrum of tools focussing on different areas and modes of application.
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