[R] Information function in CRM model

[Cecilia Reyna]

Dear,

I am trying to model the information function of items (and full) based on
the continuous response model.

I am using the EstCRM (1.4) package, but it doesn't compute the information
function.

Another person noticed me of Wang & Zeng's paper (Item parameter estimation
for a continuous response model using an EM algorithm, 1998, Applied
Psychological Measurement). But I am not sure how to calculate it in R.

Please, If someone has calculated that function could you share the script?

Thanks in advance,
Cecilia

-- 
Cecilia Reyna
Instituto de Investigaciones Psicológicas (IIPsi) - CONICET - UNC
Facultad de Psicología - Universidad Nacional de Córdoba
(5000) Córdoba - ARGENTINA
Tel. 54-351-5353890 int. 60201

RACC: http://www.revistas.unc.edu.ar/index.php/racc

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