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Item response theory (IRT) and the multilevel Rasch model

by Hans Julius Skaug — last modified Mar 12, 2009 06:09 AM
The multilevel Rasch model can be implented using random effects in ADMB. As an example we use data on the responses of 2042 soldiers to a total of 19 items (questions), taken from Doran et al (2007). This illustrates the use of crossed random effects in ADMB. Further, it is shown how the model easily can be generalized in ADMB. These more general models cannot be fitted with standard GLMM software such as "lmer" in R.
Model description — by Hans Julius Skaug — last modified Mar 13, 2009 08:48 AM
File Files: irt_doran — by Hans Julius Skaug — last modified Mar 12, 2009 06:25 AM
Archive containing all files needed to produce and run the ADMB program
File Files: irt1_doran — by Hans Julius Skaug — last modified Mar 12, 2009 06:25 AM
Archive containing all files needed to produce and run the ADMB program
File Files: irt2_doran — by Hans Julius Skaug — last modified Mar 12, 2009 06:26 AM
Archive containing all files needed to produce and run the ADMB program
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