Forum to ask questions relating to the mirt and mirtCAT packages in R, as well as discuss IRT analysis more generally. Bug reports or feature requests should be reported on the respective development versions of the packages on Github (mirt-issues, mirtCAT-issues), and evaluated help files can be found on the associated wiki pages (mirt wiki, mirtCAT wiki). 

Showing 1-20 of 574 topics
DTF effect size Conal Monaghan 4:43 AM
Help with the iteminfo function Dirk Pelt 3:51 AM
Testing the significance of the difference between 2 theta estimations ber...@terluin.net 7/25/17
Re: Questions Phil Chalmers 7/25/17
mirtCAT timing Aaron Kaat 7/25/17
Re: Odd Information Curves Phil Chalmers 7/25/17
empiricalhist to simulate latent thetas Elia Emmers 7/25/17
How do I check unidimensionality in a 3PL using survey.weights Gustavo Silva 7/23/17
Possible bug: lr.beta coefficients seem to be fixed to zero mrw...@mail.harvard.edu 7/20/17
Clamshell item and test information plot SKK 7/17/17
Converting IRT to CFA parameters in mirt Hugh Jwang 7/16/17
item information for all items Balal Ezanloo 7/16/17
Bayes factor Balal Ezanloo 7/14/17
three information in one plot Balal Ezanloo 7/14/17
mirtCAT custom first item Aaron Kaat 7/14/17
Adding correlations between items Vera Schäfer 7/11/17
Raw scores equivalent to theta Jerin Kim 7/9/17
Could not invert information matrix using the mixedmirt() 陈冠宇 7/6/17
plotting item characteristic curves for all items in the data Irshad Mujawar 7/6/17
cross-validation Vera Schäfer 7/5/17
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