[Rasch] Difficulty Performing Rasch Analysis in R.

Bond, Trevor trevor.bond at jcu.edu.au
Tue May 3 12:21:39 AEST 2016

That cannot be done using the PCM option?
Why not?

On 3/05/2016 9:16 am, "Rasch on behalf of Nicholas Commons-Miller"
<rasch-bounces at acer.edu.au on behalf of ncommons at gmail.com> wrote:

>Dear Rasch listserv,
>I am trying to analyze my data, which has 67 binary items and 5 ternary
>items. I am trying to analyze it using a package called eRm (version
>0.15-6) in R statistics. I am successful able to analyze the first 67
>items using basic Rasch analysis, but I am failing to analyze the entire
>set of items at once. I have tried to do it with RSM, PCM, and LRSM (all
>included in the eRm package), but have not been successful with any of
>them. Conceptually, I think that LRSM should be the correct one.
>I have attached the data in TXT format. It consists of 72 columns (the
>items) and 80 rows (the participants).
>Any insight on which analysis to use and how to use it would be greatly
>My best,
>Nicholas Commons-Miller

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