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ltm

Latent Trait Models under IRT

v1.2-0 · Feb 18, 2022 · GPL (>= 2)

Description

Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.

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CRAN Check Status

2 NOTE
12 OK
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r-devel-linux-x86_64-debian-clang NOTE
r-devel-linux-x86_64-debian-gcc NOTE
r-devel-linux-x86_64-fedora-clang OK
r-devel-linux-x86_64-fedora-gcc OK
r-devel-macos-arm64 OK
r-devel-windows-x86_64 OK
r-oldrel-macos-arm64 OK
r-oldrel-macos-x86_64 OK
r-oldrel-windows-x86_64 OK
r-patched-linux-x86_64 OK
r-release-linux-x86_64 OK
r-release-macos-arm64 OK
r-release-macos-x86_64 OK
r-release-windows-x86_64 OK
Check details (14 non-OK)
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Dimitris Rizopoulos <d.rizopoulos@erasmusmc.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dimitris",
                    family = "Rizopoulos",
                    role = c("aut", "cre"),
                    email = "d.rizopoulos@erasmusmc.nl")
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-style citEntry().  Please
use bibentry() instead.
NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Dimitris Rizopoulos <d.rizopoulos@erasmusmc.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dimitris",
                    family = "Rizopoulos",
                    role = c("aut", "cre"),
                    email = "d.rizopoulos@erasmusmc.nl")
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-style citEntry().  Please
use bibentry() instead.
OK r-devel-linux-x86_64-fedora-clang

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OK r-devel-linux-x86_64-fedora-gcc

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OK r-devel-macos-arm64

*


            
OK r-devel-windows-x86_64

*


            
OK r-oldrel-macos-arm64

*


            
OK r-oldrel-macos-x86_64

*


            
OK r-oldrel-windows-x86_64

*


            
OK r-patched-linux-x86_64

*


            
OK r-release-linux-x86_64

*


            
OK r-release-macos-arm64

*


            
OK r-release-macos-x86_64

*


            
OK r-release-windows-x86_64

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Check History

NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 9, 2026
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Dimitris Rizopoulos <d.rizopoulos@erasmusmc.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dimitris",
                    family = "Rizopoulos",
                    role = c("aut", "cre"),
                    email = "d.rizopoulos@erasmusmc.nl")
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-sty
NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Dimitris Rizopoulos <d.rizopoulos@erasmusmc.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dimitris",
                    family = "Rizopoulos",
                    role = c("aut", "cre"),
                    email = "d.rizopoulos@erasmusmc.nl")
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-sty

Reverse Dependencies (24)

Dependency Network

Dependencies Reverse dependencies MASS msm polycor GPCMlasso IMTest PCMRS PerFit UPCM catSurv integIRTy irtoys kequate subscore CTTShiny IRTShiny PsyControl RSP difR +9 more reverse deps ltm

Version History

new 1.2-0 Mar 9, 2026