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diffIRT

Diffusion IRT Models for Response and Response Time Data

v1.5 · Aug 14, 2015 · GPL-2

Description

Package to fit diffusion-based IRT models to response and response time data. Models are fit using marginal maximum likelihood. Parameter restrictions (fixed value and equality constraints) are possible. In addition, factor scores (person drift rate and person boundary separation) can be estimated. Model fit assessment tools are also available. The traditional diffusion model can be estimated as well.

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CRAN Check Status

4 NOTE
10 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 NOTE
r-devel-linux-x86_64-fedora-gcc NOTE
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 (4 non-OK)
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Dylan Molenaar <d.molenaar@uva.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dylan",
                    family = "Molenaar",
                    role = c("aut", "cre"),
                    email = "d.molenaar@uva.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: ‘Dylan Molenaar <d.molenaar@uva.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dylan",
                    family = "Molenaar",
                    role = c("aut", "cre"),
                    email = "d.molenaar@uva.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-fedora-clang

compiled code

File ‘diffIRT/libs/diffIRT.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
NOTE r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘diffIRT/libs/diffIRT.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.

Check History

NOTE 10 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Dylan Molenaar <d.molenaar@uva.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dylan",
                    family = "Molenaar",
                    role = c("aut", "cre"),
                 
...[truncated]...
ar@uva.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: ‘Dylan Molenaar <d.molenaar@uva.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dylan",
                    family = "Molenaar",
                    role = c("aut", "cre"),
                 
...[truncated]...
ar@uva.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-fedora-clang

compiled code

File ‘diffIRT/libs/diffIRT.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
NOTE r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘diffIRT/libs/diffIRT.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.

Dependency Network

Dependencies Reverse dependencies statmod diffIRT

Version History

new 1.5 Mar 10, 2026
updated 1.5 ← 1.4 diff Aug 13, 2015
updated 1.4 ← 1.2 diff Jun 4, 2014
new 1.2 Nov 4, 2013