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Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X

This is probably the most frequent limitation of JMP at my organization. Unequal variances suggest to use Welch's ANOVA, but options are limited for multiple comparisons with unequal variances. Steel-Dwass doesn't work well with small sample sizes and it's not clear that it is robust to very unequal variances.

Games-Howell test is effectively a Welch's version of Tukey's HSD and works well with small sample sizes.

Basic Data Analysis and Modeling

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X

**Update: I uploaded an add-in version of my application to the File Exchange: Games-Howell Test (Tukey HSD with Welch's correction for Unequal Variances)

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X

No movement on this yet from what I can tell, but I started creating an add-in for it recently. Right now, I have it functioning for X and Y inputs, but hope to incorporate a By variable when I get a chance. You can try it now if it would be helpful for you. Here's a snippet of the dialog and report. Feel free to PM me and I will send it to you. Recall and Help buttons are also non-functional right now. GH Dialog.png

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X

Has a solution for this issue been determined? I too am looking for the Games-Howell post hoc test or something comparable for multiple comparisons when unequal variances and small samples sizes are present.

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X - Status changed to: Acknowledged

Hi @cwillden , thank you for your suggestion! We have captured your request and will take it under consideration.

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X - Status changed to: Yes, Stay Tuned!

Re: Games-Howell Test (Tukey HSD with Welch's Correction for Unequal Variances) in Fit Y by X - Status changed to: Delivered

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