Re: GENLINMIXED EMMEANS don't agree with descriptives

Posted by Beckstead, Jason-2 on Mar 02, 2021; 4:22pm
URL: http://spssx-discussion.165.s1.nabble.com/GENLINMIXED-EMMEANS-don-t-agree-with-descriptives-tp5740214p5740240.html

Thanks Andy, your excel sheet is helpful.
How did you get GENLINMIXED to print (or save) the intercepts for each subject?
Jason

_____________________________________________________________
Jason W. Beckstead, Ph.D.       
  Professor/Quantitative Methodologist
  University of South Florida College of Public Health
  13201 Bruce B. Downs Blvd., MDC56, Tampa, FL 33612, USA
  Statistical Editor, International Journal of Nursing Studies
  phone: [phone]  fax: [phone]          
  International Journal of Nursing Studies  http://www.elsevier.com/ijns
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-----Original Message-----
From: SPSSX(r) Discussion <[hidden email]> On Behalf Of Andy W
Sent: Tuesday, March 2, 2021 11:02 AM
To: [hidden email]
Subject: Re: GENLINMIXED EMMEANS don't agree with descriptives

Well, it does not mean the model is wrong Jason, we are just talking about different ways of summarizing the same data.

I was actually wrong in guessing it set the random intercepts to 0, it appears to just calculate them through. See an excel spreadsheet I did quickly when printing off the random intercepts in this example,

https://www.dropbox.com/s/cu3mbgpof1klech/EMMEANS_Example.xlsx?dl=0

You could calculate the EMMEANS yourself, I show how to set the random intercepts to 0 overall (which gives you your expected behavior Jason of marginal = estimated). I don't know offhand how folks do the standard error estimates for EMMEANS though.

If folks from SPSS pay attention here, this suggests it would be useful to add an option to /EMMEANS_OPTIONS to set the random effects to particular values, e.g.

/EMMEANS_OPTIONS SUBJECT=0

or something like that. Currently only supports setting the fixed effects to particular values.



-----
Andy W
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