Re: Ordinal regression Test of parallel lines

Posted by Rich Ulrich on May 05, 2020; 5:12am
URL: http://spssx-discussion.165.s1.nabble.com/Ordinal-regression-Test-of-parallel-lines-tp5739103p5739104.html

It almost surely means that the output has some other warning

which says something more.  Maybe, "The model fails to converge"

or something like that.  Is it that, or something else? 

Increasing the number of iterations is an obvious thing to try, though

that won't work if the solution steps are either drifting or cycling.

 - It's conceivable to me that by might get a convergence if you

/dropped/ some specific case, if that broke some numerical tie.

I suspect that your N is relatively small compared to the number

of variables in the model, because that's when problems are more

likely.  In addition to mentioning your N and number of variables,

you could say whether there /looks like/ there is some (big) effect.

--

Rich Ulrich

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From: SPSSX(r) Discussion <[hidden email]> on behalf of NJ1979 <[hidden email]>
Sent: Monday, May 4, 2020 11:05 AM
To: [hidden email] <[hidden email]>
Subject: Ordinal regression Test of parallel lines

 

Hi,
When I ran a ordinal regression by PLUM functionality in SPSS , for the test
of parallel lines, I received this  messages
"The Chi-Square statistic is computed based on the log-likelihood value of
the last iteration of the general model. Validity of the test is uncertain."
What does it mean and how to fix this ?

Thank you,
NJ                             




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