Negative -2 Log Likelihood

[MaxJasper]

Using Mixed model in SPSS 15 I get negative values for -2 Log Likelihood. What does this mean? Is it OK?

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[Christianne Lane]

-2ln is a comparative fit index used for comparing nested models. You
can test the significance of the difference in the -2ln between 2
models, using a chi-sq distribution with the difference in df. I
suggest reviewing the book Latent Variable Models by Lohen, which has
a great section on fitting complex models.
Christi



On Nov 23, 2007, at 3:27 PM, Max Jasper <[hidden email]> wrote:

> Using Mixed model in SPSS 15 I get negative values for -2 Log
> Likelihood. What does this mean? Is it OK?
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except
> the
> command. To leave the list, send the command
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[peter link]

Max -

You will get negative values here when the log likelihood > 1.  This is nothing unusual and it is nothing to be concerned about.

Peter Link
VA San Diego Healthcare System

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]]On Behalf Of
Max Jasper
Sent: Friday, November 23, 2007 3:27 PM
To: [hidden email]
Subject: Negative -2 Log Likelihood


Using Mixed model in SPSS 15 I get negative values for -2 Log Likelihood. What does this mean? Is it OK?

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