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 675 topics
DIF/DTF and multidimensional IRT janine.f...@gmail.com 3/16/18
Some questions about the createItem function AM 3/14/18
Re: Asymmetric Phil Chalmers 3/11/18
GGPLOT - DIF analysis (Is it possible to change the plot?) Cursos Psi 3/7/18
M2 (residmat) vs residuals-method janine.f...@gmail.com 3/7/18
mirt error Emily 3/6/18
DF for M2* Balal Ezanloo 3/2/18
Functioning of drop_sequential in DIF analyses Dirk Pelt 3/2/18
GRM power analysis? AM 3/2/18
CAT with two-tier model (bifactor) janine.f...@gmail.com 3/1/18
3PL prior for the guessing parameters June Kuo 2/23/18
Rasch Model - Constrain latent variance to 1 June Kuo 2/22/18
Modification indices? Jeanne Sinclair 2/21/18
mixed item types Jeanne Sinclair 2/20/18
A question about the invariance() in multigroup() Yingbin Zhang 2/19/18
Nominal Model - Data Matrix Leigh Allison 2/19/18
Disagreement between empirical.table and empirical.plot ? rico...@gmail.com 2/15/18
bi factor model questions Aiden loe 2/13/18
M2 CFI/TLI calculating X2.null and df.null janine.f...@gmail.com 2/12/18
error from simdata() Emily 2/12/18
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