topic Re: Sphericity test for RM-ANOVA in Univariate approach in Discussions

Sphericity test for RM-ANOVA in Univariate approach

Jonkandonkan — Tue, 23 Apr 2024 12:14:06 GMT

Hi

As I know it, there is no test to get the Mauchly sphericity test when doing RM-ANOVA in the Univariate approach.

Is there any way to get this, instead of doing the analysis in the MANOVA approach? Since I want to do post-hoc tests in the univariate format directly in the same output. Any add-in or any other approach I easily can investigate sphericity (and, if needed, get the adjusted F-values?).

Re: Sphericity test for RM-ANOVA in Univariate approach

Ross_Metusalem — Tue, 23 Apr 2024 13:04:00 GMT

In Fit Model's MANOVA personality, you can obtain the Mauchly sphericity test as well as Greenouse-Geisser and Huynh-Feldt adjusted F tests. See the documentation for a quick example and this Knowledge Base article for more details on repeated measures analyses in JMP.

Re: Sphericity test for RM-ANOVA in Univariate approach

Jonkandonkan — Tue, 23 Apr 2024 13:06:07 GMT

Thanks. However, my question was if its possibly in the univariate (split) approach and not the MANOVA.

Re: Sphericity test for RM-ANOVA in Univariate approach

Ross_Metusalem — Tue, 23 Apr 2024 22:23:59 GMT

Thanks for the clarification, and apologies for misreading your original question. The short answer is no, the univariate approach does not provide sphericity tests and adjustments, and I'm not aware of an add-in or other easy workaround.