{
  "_id": "6a28d3d8732311cd8758df31",
  "Package": "mirt",
  "Version": "1.46.5",
  "Type": "Package",
  "Title": "Multidimensional Item Response Theory",
  "Authors@R": "c( person(\"Phil\", family=\"Chalmers\", email =\n\"rphilip.chalmers@gmail.com\", role = c(\"aut\", \"cre\"),\ncomment = c(ORCID=\"0000-0001-5332-2810\")),\nperson(\"Joshua\", family=\"Pritikin\", role=c('ctb')),\nperson(\"Alexander\", family=\"Robitzsch\", role=c('ctb')),\nperson(\"Mateusz\", family=\"Zoltak\", role=c('ctb')),\nperson(\"KwonHyun\", family=\"Kim\", role=c('ctb')),\nperson(\"Carl F.\", family=\"Falk\", role=c('ctb')),\nperson(\"Adam\", family=\"Meade\", role=c('ctb')),\nperson(\"Lennart\", family=\"Schneider\", role=c('ctb')),\nperson(\"David\", family=\"King\", role=c('ctb')),\nperson(\"Chen-Wei\", family=\"Liu\", role=c('ctb')),\nperson(\"Ogreden\", family=\"Oguzhan\", role=c('ctb')),\nperson(\"Samuel\", family=\"Huang\", role=c('ctb')))",
  "Description": "Analysis of discrete response data using unidimensional\nand multidimensional item analysis models under the Item\nResponse Theory paradigm (Chalmers (2012)\n<doi:10.18637/jss.v048.i06>). Exploratory and confirmatory item\nfactor analysis models are estimated with quadrature (EM) or\nstochastic (MHRM) methods. Confirmatory bi-factor and two-tier\nmodels are available for modeling item testlets using dimension\nreduction EM algorithms, while multiple group analyses and\nmixed effects designs are included for detecting differential\nitem, bundle, and test functioning, and for modeling item and\nperson covariates. Finally, latent class models such as the\nDINA, DINO, multidimensional latent class, mixture IRT models,\nand zero-inflated response models are supported, as well as a\nwide family of probabilistic unfolding models.",
  "VignetteBuilder": "knitr",
  "ByteCompile": "yes",
  "LazyLoad": "yes",
  "LazyData": "yes",
  "License": "GPL (>= 3)",
  "Encoding": "UTF-8",
  "Maintainer": "Phil Chalmers <rphilip.chalmers@gmail.com>",
  "URL": "https://philchalmers.github.io/mirt/,\nhttps://github.com/philchalmers/mirt/wiki,\nhttps://groups.google.com/forum/#!forum/mirt-package",
  "BugReports": "https://github.com/philchalmers/mirt/issues?state=open",
  "Config/testthat/edition": "3",
  "Config/roxygen2/version": "8.0.0",
  "Config/pak/sysreqs": "cmake make libuv1-dev libx11-dev",
  "Repository": "https://philchalmers.r-universe.dev",
  "Date/Publication": "2026-06-10 01:48:10 UTC",
  "RemoteUrl": "https://github.com/philchalmers/mirt",
  "RemoteRef": "HEAD",
  "RemoteSha": "238ac8df24562a9502c08eff0504301258e2a303",
  "NeedsCompilation": "yes",
  "Packaged": {
    "Date": "2026-06-10 02:50:50 UTC",
    "User": "root"
  },
  "Author": "Phil Chalmers [aut, cre] (ORCID:\n<https://orcid.org/0000-0001-5332-2810>),\nJoshua Pritikin [ctb],\nAlexander Robitzsch [ctb],\nMateusz Zoltak [ctb],\nKwonHyun Kim [ctb],\nCarl F. Falk [ctb],\nAdam Meade [ctb],\nLennart Schneider [ctb],\nDavid King [ctb],\nChen-Wei Liu [ctb],\nOgreden Oguzhan [ctb],\nSamuel Huang [ctb]",
  "MD5sum": "bc5e9441aeee75f7350d8de1c382fe10",
  "_user": "philchalmers",
  "_type": "src",
  "_file": "mirt_1.46.5.tar.gz",
  "_fileid": "c8744d062bc36aafb5dd7296c00f71fa40034dfd5e071fd500630af6c5448131",
  "_filesize": 1655170,
  "_sha256": "c8744d062bc36aafb5dd7296c00f71fa40034dfd5e071fd500630af6c5448131",
  "_created": "2026-06-10T02:50:50.000Z",
  "_published": "2026-06-10T03:02:48.280Z",
  "_distro": "noble",
  "_jobs": [
    {
      "job": 80471759826,
      "time": 354,
      "config": "linux-devel-arm64",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "7525459657"
    },
    {
      "job": 80471759828,
      "time": 267,
      "config": "linux-devel-x86_64",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "7525443725"
    },
    {
      "job": 80471759834,
      "time": 277,
      "config": "linux-release-arm64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525446317"
    },
    {
      "job": 80471759827,
      "time": 286,
      "config": "linux-release-x86_64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525446719"
    },
    {
      "job": 80471759851,
      "time": 163,
      "config": "macos-oldrel-arm64",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "7525430629"
    },
    {
      "job": 80471759858,
      "time": 580,
      "config": "macos-oldrel-x86_64",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "7525511536"
    },
    {
      "job": 80471759844,
      "time": 248,
      "config": "macos-release-arm64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525441301"
    },
    {
      "job": 80471759852,
      "time": 363,
      "config": "macos-release-x86_64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525460827"
    },
    {
      "job": 80471179761,
      "time": 345,
      "config": "source",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525393952"
    },
    {
      "job": 80471759801,
      "time": 157,
      "config": "wasm-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525424523"
    },
    {
      "job": 80471759818,
      "time": 261,
      "config": "windows-devel",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "7525442969"
    },
    {
      "job": 80471759825,
      "time": 207,
      "config": "windows-oldrel",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "7525433343"
    },
    {
      "job": 80471759824,
      "time": 413,
      "config": "windows-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7525470294"
    }
  ],
  "_buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401",
  "_status": "success",
  "_host": "GitHub-Actions",
  "_upstream": "https://github.com/philchalmers/mirt",
  "_commit": {
    "id": "238ac8df24562a9502c08eff0504301258e2a303",
    "author": "Jan Netík <34926852+netique@users.noreply.github.com>",
    "committer": "GitHub <noreply@github.com>",
    "message": "Analytical derivatives in DerivTheta for `gpcmIRT` class (#282)\n\n* fix typo in reference\n\n* Analytical derivatives in DerivTheta for gpcmIRT class",
    "time": 1781056090
  },
  "_maintainer": {
    "name": "Phil Chalmers",
    "email": "rphilip.chalmers@gmail.com",
    "login": "philchalmers",
    "description": "Associate Professor",
    "uuid": 1274464,
    "orcid": "0000-0001-5332-2810"
  },
  "_registered": true,
  "_dependencies": [
    {
      "package": "stats",
      "role": "Depends"
    },
    {
      "package": "R",
      "version": ">= 4.1.0",
      "role": "Depends"
    },
    {
      "package": "stats4",
      "role": "Depends"
    },
    {
      "package": "lattice",
      "role": "Depends"
    },
    {
      "package": "methods",
      "role": "Depends"
    },
    {
      "package": "Rcpp",
      "role": "LinkingTo"
    },
    {
      "package": "RcppArmadillo",
      "role": "LinkingTo"
    },
    {
      "package": "GPArotation",
      "role": "Imports"
    },
    {
      "package": "gridExtra",
      "role": "Imports"
    },
    {
      "package": "Matrix",
      "version": ">= 1.5-0",
      "role": "Imports"
    },
    {
      "package": "Rcpp",
      "role": "Imports"
    },
    {
      "package": "mgcv",
      "role": "Imports"
    },
    {
      "package": "vegan",
      "role": "Imports"
    },
    {
      "package": "Deriv",
      "role": "Imports"
    },
    {
      "package": "splines",
      "role": "Imports"
    },
    {
      "package": "splines2",
      "role": "Imports"
    },
    {
      "package": "pbapply",
      "version": ">= 1.3-0",
      "role": "Imports"
    },
    {
      "package": "dcurver",
      "role": "Imports"
    },
    {
      "package": "SimDesign",
      "role": "Imports"
    },
    {
      "package": "boot",
      "role": "Suggests"
    },
    {
      "package": "parallel",
      "role": "Suggests"
    },
    {
      "package": "mirai",
      "role": "Suggests"
    },
    {
      "package": "latticeExtra",
      "role": "Suggests"
    },
    {
      "package": "directlabels",
      "role": "Suggests"
    },
    {
      "package": "shiny",
      "role": "Suggests"
    },
    {
      "package": "knitr",
      "role": "Suggests"
    },
    {
      "package": "markdown",
      "role": "Suggests"
    },
    {
      "package": "Rsolnp",
      "role": "Suggests"
    },
    {
      "package": "nloptr",
      "role": "Suggests"
    },
    {
      "package": "sirt",
      "role": "Suggests"
    },
    {
      "package": "plink",
      "role": "Suggests"
    },
    {
      "package": "mirtCAT",
      "role": "Suggests"
    },
    {
      "package": "testthat",
      "version": ">= 3.0.0",
      "role": "Suggests"
    }
  ],
  "_owner": "philchalmers",
  "_selfowned": true,
  "_usedby": 47,
  "_updates": [
    {
      "week": "2025-28",
      "n": 2
    },
    {
      "week": "2025-30",
      "n": 2
    },
    {
      "week": "2025-31",
      "n": 2
    },
    {
      "week": "2025-34",
      "n": 1
    },
    {
      "week": "2025-35",
      "n": 2
    },
    {
      "week": "2025-36",
      "n": 2
    },
    {
      "week": "2025-39",
      "n": 2
    },
    {
      "week": "2025-41",
      "n": 8
    },
    {
      "week": "2025-42",
      "n": 1
    },
    {
      "week": "2025-43",
      "n": 1
    },
    {
      "week": "2025-44",
      "n": 9
    },
    {
      "week": "2025-45",
      "n": 4
    },
    {
      "week": "2025-46",
      "n": 7
    },
    {
      "week": "2025-47",
      "n": 3
    },
    {
      "week": "2025-49",
      "n": 1
    },
    {
      "week": "2025-50",
      "n": 3
    },
    {
      "week": "2026-09",
      "n": 3
    },
    {
      "week": "2026-10",
      "n": 15
    },
    {
      "week": "2026-11",
      "n": 2
    },
    {
      "week": "2026-12",
      "n": 4
    },
    {
      "week": "2026-17",
      "n": 3
    },
    {
      "week": "2026-20",
      "n": 4
    },
    {
      "week": "2026-23",
      "n": 2
    },
    {
      "week": "2026-24",
      "n": 2
    }
  ],
  "_tags": [
    {
      "name": "v1.45.1",
      "date": "2025-09-05"
    },
    {
      "name": "v1.46.1",
      "date": "2026-03-06"
    }
  ],
  "_topics": [
    "irt",
    "mirt",
    "openblas",
    "cpp",
    "openmp"
  ],
  "_stars": 229,
  "_contributors": [
    {
      "user": "philchalmers",
      "count": 3255,
      "uuid": 1274464
    },
    {
      "user": "sumny",
      "count": 9,
      "uuid": 17437765
    },
    {
      "user": "seonghobae",
      "count": 7,
      "uuid": 8172694
    },
    {
      "user": "sghng",
      "count": 4,
      "uuid": 58419736
    },
    {
      "user": "netique",
      "count": 2,
      "uuid": 34926852
    },
    {
      "user": "kss2k",
      "count": 2,
      "uuid": 113430607
    },
    {
      "user": "sebastianueckert",
      "count": 2,
      "uuid": 3670896
    },
    {
      "user": "awmeade",
      "count": 1,
      "uuid": 8507793
    },
    {
      "user": "jpritikin",
      "count": 1,
      "uuid": 2002771
    },
    {
      "user": "wibeasley",
      "count": 1,
      "uuid": 1372890
    }
  ],
  "_userbio": {
    "uuid": 1274464,
    "type": "user",
    "name": "Phil Chalmers",
    "description": "Associate Professor"
  },
  "_downloads": {
    "count": 12931,
    "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/mirt"
  },
  "_mentions": 81,
  "_devurl": "https://github.com/philchalmers/mirt",
  "_pkgdown": "https://philchalmers.github.io/mirt/",
  "_searchresults": 2540,
  "_rbuild": "4.6.0",
  "_assets": [
    "extra/citation.cff",
    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/mirt.html",
    "extra/NEWS.html",
    "extra/NEWS.txt",
    "extra/readme.html",
    "extra/readme.md",
    "manual.pdf"
  ],
  "_homeurl": "https://github.com/philchalmers/mirt",
  "_realowner": "philchalmers",
  "_cranurl": true,
  "_releases": [
    {
      "version": "0.1-13",
      "date": "2011-07-02"
    },
    {
      "version": "0.1-14",
      "date": "2011-07-23"
    },
    {
      "version": "0.1-15",
      "date": "2011-08-08"
    },
    {
      "version": "0.1-16",
      "date": "2011-09-15"
    },
    {
      "version": "0.1-17",
      "date": "2011-10-12"
    },
    {
      "version": "0.1-18",
      "date": "2011-10-14"
    },
    {
      "version": "0.1-19",
      "date": "2011-11-24"
    },
    {
      "version": "0.1-20",
      "date": "2012-02-04"
    },
    {
      "version": "0.2.0",
      "date": "2012-02-15"
    },
    {
      "version": "0.2.1",
      "date": "2012-04-06"
    },
    {
      "version": "0.2.3",
      "date": "2012-05-02"
    },
    {
      "version": "0.2.4",
      "date": "2012-05-09"
    },
    {
      "version": "0.2.5",
      "date": "2012-06-07"
    },
    {
      "version": "0.2.6",
      "date": "2012-07-15"
    },
    {
      "version": "0.3.0",
      "date": "2012-08-23"
    },
    {
      "version": "0.4.0",
      "date": "2012-09-22"
    },
    {
      "version": "0.4.1",
      "date": "2012-10-23"
    },
    {
      "version": "0.4.2",
      "date": "2012-11-25"
    },
    {
      "version": "0.5.0",
      "date": "2013-01-17"
    },
    {
      "version": "0.6.0",
      "date": "2013-03-19"
    },
    {
      "version": "0.7.0",
      "date": "2013-04-21"
    },
    {
      "version": "0.8.0",
      "date": "2013-07-02"
    },
    {
      "version": "0.9.0",
      "date": "2013-08-31"
    },
    {
      "version": "1.0",
      "date": "2013-11-01"
    },
    {
      "version": "1.1",
      "date": "2013-12-20"
    },
    {
      "version": "1.2",
      "date": "2014-02-20"
    },
    {
      "version": "1.2.1",
      "date": "2014-02-21"
    },
    {
      "version": "1.3",
      "date": "2014-04-23"
    },
    {
      "version": "1.4",
      "date": "2014-06-22"
    },
    {
      "version": "1.5",
      "date": "2014-08-14"
    },
    {
      "version": "1.6.1",
      "date": "2014-10-10"
    },
    {
      "version": "1.7",
      "date": "2014-12-15"
    },
    {
      "version": "1.8",
      "date": "2015-01-22"
    },
    {
      "version": "1.9",
      "date": "2015-03-29"
    },
    {
      "version": "1.10",
      "date": "2015-06-15"
    },
    {
      "version": "1.13",
      "date": "2015-09-09"
    },
    {
      "version": "1.14",
      "date": "2015-11-19"
    },
    {
      "version": "1.15",
      "date": "2016-01-21"
    },
    {
      "version": "1.16",
      "date": "2016-03-07"
    },
    {
      "version": "1.17",
      "date": "2016-04-27"
    },
    {
      "version": "1.17.1",
      "date": "2016-04-27"
    },
    {
      "version": "1.18",
      "date": "2016-06-24"
    },
    {
      "version": "1.19",
      "date": "2016-08-18"
    },
    {
      "version": "1.20.1",
      "date": "2016-10-07"
    },
    {
      "version": "1.21",
      "date": "2016-12-01"
    },
    {
      "version": "1.22",
      "date": "2017-02-01"
    },
    {
      "version": "1.23",
      "date": "2017-03-02"
    },
    {
      "version": "1.24",
      "date": "2017-05-04"
    },
    {
      "version": "1.25",
      "date": "2017-07-23"
    },
    {
      "version": "1.26.1",
      "date": "2017-11-27"
    },
    {
      "version": "1.26.3",
      "date": "2017-11-30"
    },
    {
      "version": "1.27.1",
      "date": "2018-03-16"
    },
    {
      "version": "1.28",
      "date": "2018-05-20"
    },
    {
      "version": "1.29",
      "date": "2018-08-12"
    },
    {
      "version": "1.30",
      "date": "2019-01-29"
    },
    {
      "version": "1.31",
      "date": "2019-09-15"
    },
    {
      "version": "1.32",
      "date": "2020-04-24"
    },
    {
      "version": "1.32.1",
      "date": "2020-04-25"
    },
    {
      "version": "1.33.2",
      "date": "2020-10-31"
    },
    {
      "version": "1.34",
      "date": "2021-06-28"
    },
    {
      "version": "1.35.1",
      "date": "2021-12-09"
    },
    {
      "version": "1.36",
      "date": "2022-03-21"
    },
    {
      "version": "1.36.1",
      "date": "2022-03-22"
    },
    {
      "version": "1.37.1",
      "date": "2022-08-10"
    },
    {
      "version": "1.38.1",
      "date": "2023-02-28"
    },
    {
      "version": "1.39",
      "date": "2023-05-30"
    },
    {
      "version": "1.40",
      "date": "2023-08-10"
    },
    {
      "version": "1.41",
      "date": "2023-10-17"
    },
    {
      "version": "1.42",
      "date": "2024-07-14"
    },
    {
      "version": "1.43",
      "date": "2024-11-14"
    },
    {
      "version": "1.44.0",
      "date": "2025-01-28"
    },
    {
      "version": "1.45.1",
      "date": "2025-09-06"
    },
    {
      "version": "1.46.1",
      "date": "2026-03-07"
    }
  ],
  "_exports": [
    "anova",
    "areainfo",
    "averageMI",
    "bfactor",
    "boot.LR",
    "boot.mirt",
    "coef",
    "createGroup",
    "createItem",
    "DeltaMethod",
    "DIF",
    "draw_parameters",
    "DRF",
    "DTF",
    "empirical_ES",
    "empirical_plot",
    "empirical_rxx",
    "estfun.AllModelClass",
    "expand.table",
    "expected.item",
    "expected.test",
    "extract.group",
    "extract.item",
    "extract.mirt",
    "fixedCalib",
    "fixef",
    "fscores",
    "gen.difficulty",
    "imputeMissing",
    "itemfit",
    "itemGAM",
    "iteminfo",
    "itemplot",
    "itemstats",
    "key2binary",
    "lagrange",
    "likert2int",
    "logLik",
    "M2",
    "marginal_moments",
    "marginal_rxx",
    "MDIFF",
    "mdirt",
    "MDISC",
    "mirt",
    "mirt.model",
    "mirtCluster",
    "mixedmirt",
    "mod2values",
    "multipleGroup",
    "numerical_deriv",
    "personfit",
    "PLCI.mirt",
    "plot",
    "poly2dich",
    "probtrace",
    "randef",
    "RCI",
    "read.mirt",
    "remap.distance",
    "residuals",
    "reverse.score",
    "RMSD_DIF",
    "secondOrderTest",
    "SIBTEST",
    "simdata",
    "summary",
    "testinfo",
    "thetaComb",
    "traditional2mirt",
    "vcov",
    "wald"
  ],
  "_datasets": [
    {
      "name": "ASVAB",
      "title": "Description of ASVAB data",
      "object": "ASVAB",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Item.1",
        "Item.2",
        "Item.3",
        "Item.4",
        "White_Male",
        "White_Female",
        "Black_Male",
        "Black_Female"
      ],
      "rows": 16,
      "table": true,
      "tojson": true
    },
    {
      "name": "Attitude",
      "title": "Description of Attitude data",
      "object": "Attitude",
      "class": [
        "data.frame"
      ],
      "fields": [
        "hideous",
        "state_teaching",
        "deterrent",
        "believe_not.necessary",
        "necessary_wish.not",
        "must.have",
        "justified",
        "deserved",
        "freq"
      ],
      "rows": 22,
      "table": true,
      "tojson": true
    },
    {
      "name": "Bock1997",
      "title": "Description of Bock 1997 data",
      "object": "Bock1997",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Item.1",
        "Item.2",
        "Item.3",
        "Freq"
      ],
      "rows": 64,
      "table": true,
      "tojson": true
    },
    {
      "name": "deAyala",
      "title": "Description of deAyala data",
      "object": "deAyala",
      "class": [
        "matrix",
        "array"
      ],
      "fields": [
        "Item.1",
        "Item.2",
        "Item.3",
        "Item.4",
        "Item.5",
        "Frequency"
      ],
      "rows": 32,
      "table": true,
      "tojson": true
    },
    {
      "name": "LSAT6",
      "title": "Description of LSAT6 data",
      "object": "LSAT6",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Item_1",
        "Item_2",
        "Item_3",
        "Item_4",
        "Item_5",
        "Freq"
      ],
      "rows": 30,
      "table": true,
      "tojson": true
    },
    {
      "name": "LSAT7",
      "title": "Description of LSAT7 data",
      "object": "LSAT7",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Item.1",
        "Item.2",
        "Item.3",
        "Item.4",
        "Item.5",
        "freq"
      ],
      "rows": 32,
      "table": true,
      "tojson": true
    },
    {
      "name": "SAT12",
      "title": "Description of SAT12 data",
      "object": "SAT12",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Item.1",
        "Item.2",
        "Item.3",
        "Item.4",
        "Item.5",
        "Item.6",
        "Item.7",
        "Item.8",
        "Item.9",
        "Item.10",
        "Item.11",
        "Item.12",
        "Item.13",
        "Item.14",
        "Item.15",
        "Item.16",
        "Item.17",
        "Item.18",
        "Item.19",
        "Item.20",
        "Item.21",
        "Item.22",
        "Item.23",
        "Item.24",
        "Item.25",
        "Item.26",
        "Item.27",
        "Item.28",
        "Item.29",
        "Item.30",
        "Item.31",
        "Item.32"
      ],
      "rows": 600,
      "table": true,
      "tojson": true
    },
    {
      "name": "Science",
      "title": "Description of Science data",
      "object": "Science",
      "class": [
        "data.frame"
      ],
      "fields": [
        "Comfort",
        "Work",
        "Future",
        "Benefit"
      ],
      "rows": 392,
      "table": true,
      "tojson": true
    },
    {
      "name": "SLF",
      "title": "Social Life Feelings Data",
      "object": "SLF",
      "class": [
        "data.frame"
      ],
      "fields": [
        "social1",
        "social2",
        "social3",
        "social4",
        "social5",
        "freq"
      ],
      "rows": 32,
      "table": true,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "mirt-package",
      "title": "Full information maximum likelihood estimation of IRT models.",
      "topics": [
        "mirt-package"
      ]
    },
    {
      "page": "anova-method",
      "title": "Compare nested models with likelihood-based statistics",
      "topics": [
        "anova,DiscreteClass-method",
        "anova,MixedClass-method",
        "anova,MixtureClass-method",
        "anova,MultipleGroupClass-method",
        "anova,SingleGroupClass-method",
        "anova-method"
      ]
    },
    {
      "page": "areainfo",
      "title": "Function to calculate the area under a selection of information curves",
      "topics": [
        "areainfo"
      ]
    },
    {
      "page": "ASVAB",
      "title": "Description of ASVAB data",
      "topics": [
        "ASVAB"
      ]
    },
    {
      "page": "Attitude",
      "title": "Description of Attitude data",
      "topics": [
        "Attitude"
      ]
    },
    {
      "page": "averageMI",
      "title": "Collapse values from multiple imputation draws",
      "topics": [
        "averageMI"
      ]
    },
    {
      "page": "bfactor",
      "title": "Full-Information Item Bi-factor and Two-Tier Analysis",
      "topics": [
        "bfactor"
      ]
    },
    {
      "page": "Bock1997",
      "title": "Description of Bock 1997 data",
      "topics": [
        "Bock1997"
      ]
    },
    {
      "page": "boot.LR",
      "title": "Parametric bootstrap likelihood-ratio test",
      "topics": [
        "boot.LR"
      ]
    },
    {
      "page": "boot.mirt",
      "title": "Calculate bootstrapped standard errors for estimated models",
      "topics": [
        "boot.mirt"
      ]
    },
    {
      "page": "coef-method",
      "title": "Extract raw coefs from model object",
      "topics": [
        "coef,DiscreteClass-method",
        "coef,MixedClass-method",
        "coef,MixtureClass-method",
        "coef,MultipleGroupClass-method",
        "coef,SingleGroupClass-method",
        "coef-method"
      ]
    },
    {
      "page": "createGroup",
      "title": "Create a user defined group-level object with correct generic functions",
      "topics": [
        "createGroup"
      ]
    },
    {
      "page": "createItem",
      "title": "Create a user defined item with correct generic functions",
      "topics": [
        "createItem"
      ]
    },
    {
      "page": "deAyala",
      "title": "Description of deAyala data",
      "topics": [
        "deAyala"
      ]
    },
    {
      "page": "DeltaMethod",
      "title": "Numerical derivative version of delta method",
      "topics": [
        "DeltaMethod"
      ]
    },
    {
      "page": "DIF",
      "title": "Differential item functioning statistics",
      "topics": [
        "DIF"
      ]
    },
    {
      "page": "DiscreteClass-class",
      "title": "Class \"DiscreteClass\"",
      "topics": [
        "DiscreteClass-class"
      ]
    },
    {
      "page": "draw_parameters",
      "title": "Draw plausible parameter instantiations from a given model",
      "topics": [
        "draw_parameters"
      ]
    },
    {
      "page": "DRF",
      "title": "Differential Response Functioning statistics",
      "topics": [
        "DRF"
      ]
    },
    {
      "page": "DTF",
      "title": "Differential test functioning statistics",
      "topics": [
        "DTF"
      ]
    },
    {
      "page": "empirical_ES",
      "title": "Empirical effect sizes based on latent trait estimates",
      "topics": [
        "empirical_ES"
      ]
    },
    {
      "page": "empirical_plot",
      "title": "Function to generate empirical unidimensional item and test plots",
      "topics": [
        "empirical_plot"
      ]
    },
    {
      "page": "empirical_rxx",
      "title": "Function to calculate the empirical (marginal) reliability",
      "topics": [
        "empirical_rxx"
      ]
    },
    {
      "page": "estfun.AllModelClass",
      "title": "Extract Empirical Estimating Functions",
      "topics": [
        "estfun.AllModelClass"
      ]
    },
    {
      "page": "expand.table",
      "title": "Expand summary table of patterns and frequencies",
      "topics": [
        "expand.table"
      ]
    },
    {
      "page": "expected.item",
      "title": "Function to calculate expected value of item",
      "topics": [
        "expected.item"
      ]
    },
    {
      "page": "expected.test",
      "title": "Function to calculate expected test score",
      "topics": [
        "expected.test"
      ]
    },
    {
      "page": "extract.group",
      "title": "Extract a group from a multiple group mirt object",
      "topics": [
        "extract.group"
      ]
    },
    {
      "page": "extract.item",
      "title": "Extract an item object from 'mirt' objects",
      "topics": [
        "extract.item"
      ]
    },
    {
      "page": "extract.mirt",
      "title": "Extract various elements from estimated model objects",
      "topics": [
        "extract.mirt"
      ]
    },
    {
      "page": "fixedCalib",
      "title": "Fixed-item calibration method",
      "topics": [
        "fixedCalib"
      ]
    },
    {
      "page": "fixef",
      "title": "Compute latent regression fixed effect expected values",
      "topics": [
        "fixef"
      ]
    },
    {
      "page": "fscores",
      "title": "Compute factor score estimates (a.k.a, ability estimates, latent trait estimates, etc)",
      "topics": [
        "fscores"
      ]
    },
    {
      "page": "gen.difficulty",
      "title": "Generalized item difficulty summaries",
      "topics": [
        "gen.difficulty"
      ]
    },
    {
      "page": "head.mirt_matrix",
      "title": "Head generic for customized matrix console output",
      "topics": [
        "head.mirt_matrix"
      ]
    },
    {
      "page": "imputeMissing",
      "title": "Imputing plausible data for missing values",
      "topics": [
        "imputeMissing"
      ]
    },
    {
      "page": "itemfit",
      "title": "Item fit statistics",
      "topics": [
        "itemfit"
      ]
    },
    {
      "page": "itemGAM",
      "title": "Parametric smoothed regression lines for item response probability functions",
      "topics": [
        "itemGAM",
        "plot.itemGAM"
      ]
    },
    {
      "page": "iteminfo",
      "title": "Function to calculate item information",
      "topics": [
        "iteminfo"
      ]
    },
    {
      "page": "itemplot",
      "title": "Displays item surface and information plots",
      "topics": [
        "itemplot"
      ]
    },
    {
      "page": "itemstats",
      "title": "Generic item summary statistics",
      "topics": [
        "itemstats"
      ]
    },
    {
      "page": "key2binary",
      "title": "Score a test by converting response patterns to binary data",
      "topics": [
        "key2binary"
      ]
    },
    {
      "page": "lagrange",
      "title": "Lagrange test for freeing parameters",
      "topics": [
        "lagrange"
      ]
    },
    {
      "page": "likert2int",
      "title": "Convert ordered Likert-scale responses (character or factors) to integers",
      "topics": [
        "likert2int"
      ]
    },
    {
      "page": "logLik-method",
      "title": "Extract log-likelihood",
      "topics": [
        "logLik,DiscreteClass-method",
        "logLik,MixedClass-method",
        "logLik,MixtureClass-method",
        "logLik,MultipleGroupClass-method",
        "logLik,SingleGroupClass-method",
        "logLik-method"
      ]
    },
    {
      "page": "LSAT6",
      "title": "Description of LSAT6 data",
      "topics": [
        "LSAT6"
      ]
    },
    {
      "page": "LSAT7",
      "title": "Description of LSAT7 data",
      "topics": [
        "LSAT7"
      ]
    },
    {
      "page": "M2",
      "title": "Compute the M2 model fit statistic",
      "topics": [
        "M2"
      ]
    },
    {
      "page": "marginal_moments",
      "title": "Function to calculate the marginal moments for items and bundles fit via IRT models",
      "topics": [
        "marginal_moments"
      ]
    },
    {
      "page": "marginal_rxx",
      "title": "Function to calculate the marginal reliability",
      "topics": [
        "marginal_rxx"
      ]
    },
    {
      "page": "MDIFF",
      "title": "Compute multidimensional difficulty index",
      "topics": [
        "MDIFF"
      ]
    },
    {
      "page": "mdirt",
      "title": "Multidimensional discrete item response theory",
      "topics": [
        "mdirt"
      ]
    },
    {
      "page": "MDISC",
      "title": "Compute multidimensional discrimination index",
      "topics": [
        "MDISC"
      ]
    },
    {
      "page": "mirt",
      "title": "Full-Information Item Factor Analysis (Multidimensional Item Response Theory)",
      "topics": [
        "mirt"
      ]
    },
    {
      "page": "mirt.model",
      "title": "Specify model information",
      "topics": [
        "mirt.model"
      ]
    },
    {
      "page": "mirtCluster",
      "title": "Define a parallel cluster object to be used in internal functions",
      "topics": [
        "mirtCluster"
      ]
    },
    {
      "page": "MixedClass-class",
      "title": "Class \"MixedClass\"",
      "topics": [
        "MixedClass-class"
      ]
    },
    {
      "page": "mixedmirt",
      "title": "Mixed effects modeling for MIRT models",
      "topics": [
        "mixedmirt"
      ]
    },
    {
      "page": "MixtureClass-class",
      "title": "Class \"MixtureClass\"",
      "topics": [
        "MixtureClass-class"
      ]
    },
    {
      "page": "mod2values",
      "title": "Convert an estimated mirt model to a data.frame",
      "topics": [
        "mod2values"
      ]
    },
    {
      "page": "multipleGroup",
      "title": "Multiple Group Estimation",
      "topics": [
        "multipleGroup"
      ]
    },
    {
      "page": "MultipleGroupClass-class",
      "title": "Class \"MultipleGroupClass\"",
      "topics": [
        "MultipleGroupClass-class"
      ]
    },
    {
      "page": "numerical_deriv",
      "title": "Compute numerical derivatives",
      "topics": [
        "numerical_deriv"
      ]
    },
    {
      "page": "personfit",
      "title": "Person fit statistics",
      "topics": [
        "personfit"
      ]
    },
    {
      "page": "PLCI.mirt",
      "title": "Compute profiled-likelihood (or posterior) confidence intervals",
      "topics": [
        "PLCI.mirt"
      ]
    },
    {
      "page": "plot-method",
      "title": "Plot various test-implied functions from models",
      "topics": [
        "plot,DiscreteClass,missing-method",
        "plot,MixtureClass,missing-method",
        "plot,MultipleGroupClass,missing-method",
        "plot,MultipleGroupClass-method",
        "plot,SingleGroupClass,missing-method",
        "plot,SingleGroupClass-method",
        "plot-method"
      ]
    },
    {
      "page": "poly2dich",
      "title": "Change polytomous items to dichotomous item format",
      "topics": [
        "poly2dich"
      ]
    },
    {
      "page": "print-method",
      "title": "Print the model objects",
      "topics": [
        "print,DiscreteClass-method",
        "print,MixedClass-method",
        "print,MixtureClass-method",
        "print,MultipleGroupClass-method",
        "print,SingleGroupClass-method",
        "print-method"
      ]
    },
    {
      "page": "print.mirt_df",
      "title": "Print generic for customized data.frame console output",
      "topics": [
        "print.mirt_df"
      ]
    },
    {
      "page": "print.mirt_list",
      "title": "Print generic for customized list console output",
      "topics": [
        "print.mirt_list"
      ]
    },
    {
      "page": "print.mirt_matrix",
      "title": "Print generic for customized matrix console output",
      "topics": [
        "print.matrix",
        "print.mirt_matrix"
      ]
    },
    {
      "page": "probtrace",
      "title": "Function to calculate probability trace lines",
      "topics": [
        "probtrace"
      ]
    },
    {
      "page": "randef",
      "title": "Compute posterior estimates of random effect",
      "topics": [
        "randef"
      ]
    },
    {
      "page": "RCI",
      "title": "Model-based Reliable Change Index",
      "topics": [
        "RCI"
      ]
    },
    {
      "page": "read.mirt",
      "title": "Translate mirt parameters into suitable structure for plink package",
      "topics": [
        "read.mirt"
      ]
    },
    {
      "page": "remap.distance",
      "title": "Remap item categories to have integer distances of 1",
      "topics": [
        "remap.distance"
      ]
    },
    {
      "page": "residuals-method",
      "title": "Compute model residuals",
      "topics": [
        "residuals,DiscreteClass-method",
        "residuals,MixtureClass-method",
        "residuals,MultipleGroupClass-method",
        "residuals,SingleGroupClass-method",
        "residuals-method"
      ]
    },
    {
      "page": "reverse.score",
      "title": "Reverse score one or more items from a response matrix",
      "topics": [
        "reverse.score"
      ]
    },
    {
      "page": "RMSD_DIF",
      "title": "RMSD effect size statistic to quantify category-level DIF",
      "topics": [
        "RMSD_DIF"
      ]
    },
    {
      "page": "SAT12",
      "title": "Description of SAT12 data",
      "topics": [
        "SAT12"
      ]
    },
    {
      "page": "Science",
      "title": "Description of Science data",
      "topics": [
        "Science"
      ]
    },
    {
      "page": "secondOrderTest",
      "title": "Second-order test of convergence",
      "topics": [
        "secondOrderTest"
      ]
    },
    {
      "page": "show-method",
      "title": "Show model object",
      "topics": [
        "show,DiscreteClass-method",
        "show,MixedClass-method",
        "show,MixtureClass-method",
        "show,MultipleGroupClass-method",
        "show,SingleGroupClass-method",
        "show-method"
      ]
    },
    {
      "page": "SIBTEST",
      "title": "(Generalized) Simultaneous Item Bias Test (SIBTEST)",
      "topics": [
        "SIBTEST"
      ]
    },
    {
      "page": "simdata",
      "title": "Simulate response patterns",
      "topics": [
        "simdata"
      ]
    },
    {
      "page": "SingleGroupClass-class",
      "title": "Class \"SingleGroupClass\"",
      "topics": [
        "SingleGroupClass-class"
      ]
    },
    {
      "page": "SLF",
      "title": "Social Life Feelings Data",
      "topics": [
        "SLF"
      ]
    },
    {
      "page": "summary-method",
      "title": "Summary of model object",
      "topics": [
        "summary,DiscreteClass-method",
        "summary,MixedClass-method",
        "summary,MixtureClass-method",
        "summary,MultipleGroupClass-method",
        "summary,SingleGroupClass-method",
        "summary-method"
      ]
    },
    {
      "page": "tail.mirt_matrix",
      "title": "Tail generic for customized matrix console output",
      "topics": [
        "tail.mirt_matrix"
      ]
    },
    {
      "page": "testinfo",
      "title": "Function to calculate test information",
      "topics": [
        "testinfo"
      ]
    },
    {
      "page": "thetaComb",
      "title": "Create all possible combinations of vector input",
      "topics": [
        "thetaComb"
      ]
    },
    {
      "page": "traditional2mirt",
      "title": "Convert traditional IRT metric into slope-intercept form used in mirt",
      "topics": [
        "traditional2mirt"
      ]
    },
    {
      "page": "vcov-method",
      "title": "Extract parameter variance covariance matrix",
      "topics": [
        "vcov,DiscreteClass-method",
        "vcov,MixedClass-method",
        "vcov,MixtureClass-method",
        "vcov,MultipleGroupClass-method",
        "vcov,SingleGroupClass-method",
        "vcov-method"
      ]
    },
    {
      "page": "wald",
      "title": "Wald statistics for mirt models",
      "topics": [
        "wald"
      ]
    }
  ],
  "_readme": "https://github.com/philchalmers/mirt/raw/HEAD/README.md",
  "_rundeps": [
    "audio",
    "beepr",
    "brio",
    "callr",
    "class",
    "cli",
    "clipr",
    "cluster",
    "codetools",
    "crayon",
    "dcurver",
    "Deriv",
    "desc",
    "diffobj",
    "digest",
    "dplyr",
    "e1071",
    "evaluate",
    "fs",
    "future",
    "future.apply",
    "generics",
    "globals",
    "glue",
    "GPArotation",
    "gridExtra",
    "gtable",
    "jsonlite",
    "lattice",
    "lifecycle",
    "listenv",
    "magrittr",
    "MASS",
    "Matrix",
    "mgcv",
    "nlme",
    "otel",
    "parallelly",
    "pbapply",
    "permute",
    "pillar",
    "pkgbuild",
    "pkgconfig",
    "pkgload",
    "praise",
    "processx",
    "progressr",
    "proxy",
    "ps",
    "qs2",
    "R.methodsS3",
    "R.oo",
    "R.utils",
    "R6",
    "Rcpp",
    "RcppArmadillo",
    "RcppParallel",
    "rlang",
    "rprojroot",
    "sessioninfo",
    "SimDesign",
    "splines2",
    "stringfish",
    "testthat",
    "tibble",
    "tidyselect",
    "utf8",
    "vctrs",
    "vegan",
    "waldo",
    "withr"
  ],
  "_sysdeps": [
    {
      "shlib": "liblapack",
      "package": "libopenblas0-pthread",
      "source": "openblas",
      "version": "0.3.26+ds-1ubuntu0.1",
      "name": "openblas",
      "homepage": "https://www.openblas.net/",
      "description": "Optimized BLAS (linear algebra) library (shared lib, pthread)"
    },
    {
      "shlib": "libblas",
      "package": "libopenblas0-pthread",
      "source": "openblas",
      "version": "0.3.26+ds-1ubuntu0.1",
      "name": "openblas",
      "homepage": "https://www.openblas.net/",
      "description": "Optimized BLAS (linear algebra) library (shared lib, pthread)"
    },
    {
      "shlib": "libstdc++",
      "package": "libstdc++6",
      "source": "gcc",
      "version": "14.2.0-4ubuntu2~24.04.1",
      "name": "c++",
      "homepage": "http://gcc.gnu.org/",
      "description": "GNU Standard C++ Library v3"
    },
    {
      "shlib": "libgomp",
      "package": "libgomp1",
      "source": "gcc",
      "version": "14.2.0-4ubuntu2~24.04.1",
      "name": "openmp",
      "homepage": "http://gcc.gnu.org/",
      "description": "GCC OpenMP (GOMP) support library"
    }
  ],
  "_vignettes": [
    {
      "source": "mirt-vignettes.Rmd",
      "filename": "mirt-vignettes.html",
      "title": "Online Vignettes",
      "engine": "knitr::knitr",
      "headings": [
        "mirt Vignette Files"
      ],
      "created": "2014-06-21 23:55:43",
      "modified": "2015-01-15 01:09:12",
      "commits": 4
    }
  ],
  "_score": 15.058944178810757,
  "_indexed": true,
  "_nocasepkg": "mirt",
  "_universes": [
    "philchalmers"
  ],
  "_binaries": [
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "1.46.5",
      "date": "2026-06-10T02:56:02.000Z",
      "distro": "noble",
      "arch": "aarch64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "9aaa3e34b2a5f41711997e30c01a751e59ee06a16171f0d7e386ed9c5b79af76",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:33.000Z",
      "distro": "noble",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "c322a0c2f059442da679b2acb8f9380824f383fbdae1dcd2d239dc985b1745c6",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:41.000Z",
      "distro": "noble",
      "arch": "aarch64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "a527e444ec3462c550cdf527f8161441ff32a10e368f63a108c9211b6a3274e3",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:35.000Z",
      "distro": "noble",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "53caf268b3178ce3ecab63544acd387defb441c00546350e7e8e53c67c565030",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "1.46.5",
      "date": "2026-06-10T02:53:50.000Z",
      "arch": "aarch64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "6ea7f1bce247e6ed6835def0d1861fa35811238c759e4d670bffe3d813615d29",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "1.46.5",
      "date": "2026-06-10T02:56:02.000Z",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "7d9d0eeac27e712a604c1058d639df9c2f434359a4fab568607b7d1f690808aa",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:09.000Z",
      "arch": "aarch64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "2c69b65597b950171dd58f4186f4475a7767694a26f728abcf1493423780f436",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:57.000Z",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "83606bfd71774c8ad7babd273b4e69f7458ac9aa21ec2f1bcc979d2b59529cb1",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "wasm",
      "version": "1.46.5",
      "date": "2026-06-10T02:54:25.000Z",
      "arch": "emscripten",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "c0ae5c2fcfde6bcc7abf6ee4018703ef4f5f8a20dbe861353bd414a7d5a0bbee",
      "status": "success",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.7.0",
      "os": "win",
      "version": "1.46.5",
      "date": "2026-06-10T02:53:33.000Z",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "c31c34a1bc53e98a9793c62fae0de907d4d9159852992a41c1f314a49a3aaa37",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.5.3",
      "os": "win",
      "version": "1.46.5",
      "date": "2026-06-10T02:53:40.000Z",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "3726c748352c179aa7e2df4b35a6a0c52dadf4a7e4442be4ccfa3e5aec88d755",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    },
    {
      "r": "4.6.0",
      "os": "win",
      "version": "1.46.5",
      "date": "2026-06-10T02:55:32.000Z",
      "arch": "x86_64",
      "commit": "238ac8df24562a9502c08eff0504301258e2a303",
      "fileid": "b33b1ab5d9612734f15c594d01c68faee9149e6a6d98f0353f2bced713cadcfa",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/philchalmers/actions/runs/27249660401"
    }
  ]
}