[R] inconsistencies between HLM and clmm results for the signs for the coefficients

Thierry Onkelinx th|erry@onke||nx @end|ng |rom |nbo@be
Fri Oct 21 10:02:20 CEST 2022

Dear Debbie,

Have a look at the vignette of the ordinal package. Look for the equation
that defines \eta. And note the minus sign associated with \beta. You'll
need to find the equation used in HLM and compare it with the equation from

Best regards,

ir. Thierry Onkelinx
Statisticus / Statistician

Vlaamse Overheid / Government of Flanders
Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance
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Op do 20 okt. 2022 om 09:22 schreef Debbie Hahs-Vaughn <debbie using ucf.edu>:

> I've generated a very simple multilevel ordinal model using HLM software
> and using the clmm function from the ordinal package in R. The threshold
> values and coefficients are comparable, however the signs for the
> coefficients (and only the coefficients; not the thresholds) are opposite
> (e.g., positive in HLM, negative in clmm).  This then impacts the odds
> ratios for the predictors.  HLM reports odds greater than one and clmm
> reports odds less than one.  I anticipate there is a very easy reason for
> what's happening, and it's just escaping me.  Can someone please advise on
> what I've overlooked?
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