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 452 topics
DTF effect size Conal Monaghan 9/26/16
Support for Samejima CRM? Brenton Wiernik 9/26/16
problems with params Dr. Hans Hansen 9/26/16
Plot high dimensional (factors >3) models? Elia Emmers 9/26/16
DTF Jae Yung Kwon 9/24/16
coef(simplify = T) argument doesn't work with mixedmirt() object Seongho Bae 9/24/16
Re: mirt: standard error of b parameter Phil Chalmers 9/22/16
Fixing the Item parameters Irshad Mujawar 9/20/16
Simple error: "group input provided is not valid" Ivan 9/20/16
The practical usage of poly2dich() function Seongho Bae 9/18/16
The mirt() can treat missing at not random? Seongho Bae 9/17/16
information curve for partial items chest...@gmail.com 9/16/16
Question about the function of "iteminfo" daten...@gmail.com 9/13/16
Questions on validation of short scale Yuen Wan Ho 9/12/16
Paired items in unidimensional IRT Sebastian Therman 9/12/16
Fit statistics hallyo...@gmail.com 9/11/16
Likelihood functions Federico Andreis 9/1/16
coef(object) of a bifactor model returns Error: $ operator not defined for this S4 class Dimitrios Zacharatos 8/30/16
mirt 1.19 on CRAN Phil Chalmers 8/23/16
testing for significant difference in item difficulty Balazs Klein 8/19/16
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