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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-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 (2 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.

Check History

NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 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"),
...[truncated]...
smusmc.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"),
...[truncated]...
smusmc.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.

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 10, 2026
updated 1.2-0 ← 1.1-1 diff Feb 17, 2022
updated 1.1-1 ← 1.1-0 diff Apr 16, 2018
updated 1.1-0 ← 1.0-0 diff Sep 10, 2017
updated 1.0-0 ← 0.9-9 diff Dec 19, 2013
updated 0.9-9 ← 0.9-8 diff Sep 16, 2012
updated 0.9-8 ← 0.9-7 diff Aug 16, 2012
updated 0.9-7 ← 0.9-6 diff Oct 17, 2011
updated 0.9-6 ← 0.9-5 diff Sep 18, 2011
updated 0.9-5 ← 0.9-4 diff Sep 29, 2010
updated 0.9-4 ← 0.9-3 diff Mar 15, 2010
updated 0.9-3 ← 0.9-2 diff Dec 8, 2009
updated 0.9-2 ← 0.9-1 diff Oct 11, 2009
updated 0.9-1 ← 0.9-0 diff Jun 18, 2009
updated 0.9-0 ← 0.8-9 diff Mar 1, 2009
updated 0.8-9 ← 0.8-8 diff Jan 7, 2009
updated 0.8-8 ← 0.8-7 diff Dec 14, 2008
updated 0.8-7 ← 0.8-6 diff Nov 16, 2008
updated 0.8-6 ← 0.8-5 diff Sep 14, 2008
updated 0.8-5 ← 0.8-4 diff Jun 8, 2008