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 459 topics
sample independence of IRT Balazs Klein 10/20/16
Error: data contains completely empty response patterns. Please remove Virginia Ros 10/20/16
Problem using "EAPsum" in fscores Eva de Schipper 10/20/16
Implement new nominal response model Seongho Bae 10/19/16
Estimation of dynamic models? Staffan Betnér 10/19/16
"SE=T" in MIRT Yutaro Sakamoto 10/17/16
Nominal response model in MIRT Jonas Dockx 10/12/16
when a-parameter is negative Yutaro Sakamoto 10/5/16
mirt 1.19 on CRAN Phil Chalmers 10/3/16
DTF effect size Conal Monaghan 9/27/16
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
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