Hey Ben, I would love to provide the dataset but unfortunately I don't think it's possible. It's an entire state's educational accountability testing data and the state that we got the it from has required we use all sorts of securities when accessing it. It's kind of silly how many regulations they have on it actually, considering it is already completely de-identified, but such is life. Thanks again for all your help though, I really appreciate it.

Daniel

> From: Ben Bolker <bbolker@gmail.com>
> Subject: Re: [R-sig-ME] LMER False Convergence (8)
> Date: May 31, 2013 3:44:26 PM PDT
> To: r-sig-mixed-models@r-project.org
> 
> 
> Daniel Anderson <daniela@...> writes:
> 
>> 
>> Thanks again Ben, I went ahead and used the zip file from the
>> link you sent to install lme4-3. This time I did
>> not get the convergence warning. However, the verbose=T 
>> statement did not appear to work (i.e., it didn't
>> print the iteration history). Probably not a big deal,
>> but I thought it was odd and wondered if it might also
>> not be printing the warning message despite having the same issue.
> 
>  Well, this is a development version, so there might be something
> funny -- I'll check.
> 
>> 
>> Below, I've placed my results from the same model for all 
>> three programs: HLM, lme4-2, and lme4-3. I also
>> added the correlation between the variance components into
>> this table, because with lme4-3 I get an
>> estimated correlation between the random student intercept/slope 
>> of 1.0 (which was not the case with the
>> other programs). 
>> 
>> So, at this point I think I'm going to run with lme4-2,
>> and just ignore the convergence warning, unless you'd
>> suggest otherwise?
> 
>  That seems perfectly reasonable.  Would it be possible for you
> to send your data so we can have a look and see what's happening?
> (Ideally you could send it in an anonymized form so that we could
> use it for tests/examples in future versions of the package, but
> for now just having it for private use among the lme4 developers
> would be great.)
> 
>  thanks
>    Ben
> 
> 
> 
> 
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Thanks,
--
Daniel Anderson
Research Assistant
Behavioral Research and Teaching
University of Oregon











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