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 409 topics
itemtype for mixedmirt Keith Lau 12:04 AM
Re: Question on the bifactor invariance modeling Phil Chalmers 6/24/16
Re: PRIOR Phil Chalmers 6/21/16
How to simulate item responses from multidimensional partial credit model? David Y 6/17/16
Global Optimizers Keith Lau 6/12/16
vcov() for exploratory models Gina Velázquez 6/10/16
marginal reliability Serpil çelikten 6/9/16
Does mirt allow discrete item parameter? Keith Lau 6/6/16
problem in DIF marjan faghih 6/6/16
Problems simulating data Luis Manuel Lozano 6/3/16
compare the nonparametric item response functions against the 2PL item response functions Conal Monaghan 5/28/16
On Person Fit in mirt Amin 5/28/16
Saving fit, item, & person parameters from simulation replications cava...@gmail.com 5/26/16
multilevel multidimensional Rasch PCM model Diah Wihardini 5/26/16
a-paramter in bifactor model Yutaro Sakamoto 5/26/16
mixed mirt zahra...@gmail.com 5/24/16
standard error for alabama Keith Lau 5/20/16
Extra parameter Keith Lau 5/19/16
Conditional Item Blocks Tim K. 5/14/16
1PL model for Comp. and Partial Comp. Levent Yakar 5/10/16
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