[Rasch] Questions about Rasch
mike at winsteps.com
Wed Dec 25 17:47:11 AEDT 2019
Thank you for your questions.
Your 1. eRm reports person parameters for every person:
> res <- RM(datamatrix) # CMLE estimation of item easinesses
> coef(res) # report the items
> pres <- person.parameter(res) # MLE estimation of person abilities
> coef(pres) # reports the person parameters
Your 2. R in Batch mode
I do this by writing R commands to .Rprofile file
Your 3. There are plenty of Rasch articles, for instance,
www.rasch.org/rasch.htm - www.rasch.org/rmt/contents.htm
and Google. For sample size, see https://www.rasch.org/rmt/rmt74m.htm
Your 4. Which archive?
On 12/24/2019 8:55 PM, wife wrote:
> Dear Rasch fans:
> My name is Grace. I recently subscribed to Rasch listserv with an
> intent to learn more about Rasch.
> I need help with two questions.
> *(1) Is there any R package or any compatible programs (non commerical
> ones) with R for* *estimating person parameters for the simple Rasch
> model or Rasch rating scale model? *
> I know eRm, but the outputs for the person parameters are
> presented in term of summed scores. I would like person parameter
> outputs to be presented in the order of person. For instance, if we
> have 100 examinees, the output yields the results for the 100 subjects.
> *(2) Can anyone tell me how to run such a program with R in batch mode? *
> *(3) Can anyone recommend good articles on Rasch application in case
> of small sample? *
> *(4) How may I have access to Rasch archive?*
> I am currently in China and the firewall blocked many foreign
> I would greatly appreciate if anyone can help.
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