Hello Rick! Thank you very much for your response. My syntax is shown below:

DATASET ACTIVATE DataSet1.

* Generalized Estimating Equations.

GENLIN Rating_P (ORDER=ASCENDING) BY DesignTask Semester Instructor TeanNumber ParticipantNumber

(ORDER=ASCENDING) WITH IndividualKAI IndividualPsychSafety

/MODEL DesignTask Semester Instructor IndividualKAI IndividualPsychSafety

Semester(TeanNumber(ParticipantNumber)) DesignTask*IndividualKAI

DISTRIBUTION=MULTINOMIAL LINK=CUMLOGIT

/CRITERIA METHOD=FISHER(1) SCALE=1 MAXITERATIONS=100 MAXSTEPHALVING=5 PCONVERGE=1E-006(ABSOLUTE)

SINGULAR=1E-012 ANALYSISTYPE=3(WALD) CILEVEL=95 LIKELIHOOD=KERNEL

/REPEATED SUBJECT=UniqueIdeaNumber WITHINSUBJECT=count SORT=YES CORRTYPE=UNSTRUCTURED

ADJUSTCORR=YES COVB=ROBUST MAXITERATIONS=100 PCONVERGE=1e-006(ABSOLUTE) UPDATECORR=1

/MISSING CLASSMISSING=EXCLUDE

/PRINT CPS DESCRIPTIVES MODELINFO FIT SUMMARY SOLUTION WORKINGCORR.

As you can see, I added in some interaction terms as well, but these run with no problem. I really just need to account for participants nesting within teams, which also are nested within semesters (as these teams only appear once per semester). I can also leave it to just participants nesting within teams, to simplify the analysis (the nesting within semesters is technically correct, but for the sake of interpretation/the analysis actually working, I am OK with omitting it).

As for the SPSS version 28.0.1, do you know how I can go about downloading this without having to have some kind of special login? I am using a license from my academic institution, and after doing some searching, I could not find a page that would allow me to update to the latest version. I am also using Mac OS.

Thank you!

Courtney

------------------------------

Courtney Cole

------------------------------

Original Message:

Sent: Wed December 08, 2021 04:46 PM

From: Rick Marcantonio

Subject: Generalized Estimating Equations (GEE) Problem With Nested Factors

Hi. Could you please additionally share your syntax? Thanks. I can pass it on to a couple of statisticians who may have time to look at it and see if they can spot some irregularity.

Also, please download and use version 28.0.1. There are fixes in various algorithms that may be related. Thanks.

------------------------------

Rick Marcantonio

Quality Assurance

IBM

Original Message:

Sent: Wed December 08, 2021 01:41 PM

From: Courtney Cole

Subject: Generalized Estimating Equations (GEE) Problem With Nested Factors

Hello! I am trying to run an analysis with Generalized Estimating Equations (using SPSS version 28.0) to predict idea ratings of individuals, which are nested within teams. When I ran the analysis with another individual who is more familiar with GEE, everything worked until we added the nested term: TeamNumber(Participant). We are not sure why this is happening, other than the **team number and participant numbers being repeated multiple times** because we have multiple idea ratings per individual (our study looks at predicting idea RATINGS binned in 3 different categories, where participants could generate as many ideas as they'd like in a 20-minute period...we already rated the ideas and validated the ratings, but the DV is ordinal). We are also using one IV (continuous) and one moderator variable (which is also continuous, which we added as a covariate in the model, so it is more or less an IV). There are also three more control variables (design task, instructor, semester, where semester could also be part of the nested term, but I want to figure out what is the problem with adding a nested factor). This is the error we got:

"An unexpected error has occurred during estimation that suggests the specified model may be inappropriate for the data. You may be able to diagnose the problem by: checking for (quasi) complete separation in the data, checking for multicollinearity in the predictors, and running the model without a REPEATED subcommand (if one was specified) to determine whether the simpler model runs without warnings. No output will be displayed.

Execution of this command stops."

I have shared the dataset with someone who has time to look at it, as I am drawing a blank as to what is going on. I am running this analysis for my dissertation, so any help would be greatly appreciated!

------------------------------

Courtney Cole

------------------------------