{
  "_id": "6ac20a81773a0037682c0ea9",
  "Package": "plink",
  "Version": "1.5-1",
  "Date": "2017-04-26",
  "Title": "IRT Separate Calibration Linking Methods",
  "Author": "Jonathan P. Weeks <weeksjp@gmail.com>",
  "Maintainer": "Jonathan P. Weeks <weeksjp@gmail.com>",
  "Description": "Item response theory based methods are used to compute\nlinking constants and conduct chain linking of unidimensional\nor multidimensional tests for multiple groups under a common\nitem design.  The unidimensional methods include the Mean/Mean,\nMean/Sigma, Haebara, and Stocking-Lord methods for dichotomous\n(1PL, 2PL and 3PL) and/or polytomous (graded response, partial\ncredit/generalized partial credit, nominal, and multiple-choice\nmodel) items.  The multidimensional methods include the least\nsquares method and extensions of the Haebara and Stocking-Lord\nmethod using single or multiple dilation parameters for\nmultidimensional extensions of all the unidimensional\ndichotomous and polytomous item response models.  The package\nalso includes functions for importing item and/or ability\nparameters from common IRT software, conducting IRT true score\nand observed score equating, and plotting item response\ncurves/surfaces, vector plots, information plots, and\ncomparison plots for examining parameter drift.",
  "LazyLoad": "Yes",
  "LazyData": "Yes",
  "License": "GPL (>= 2)",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-10-04 07:54:22 UTC",
    "User": "root"
  },
  "Repository": "https://bocaccio.r-universe.dev",
  "Date/Publication": "2017-04-26 15:36:59 UTC",
  "RemoteUrl": "https://github.com/cran/plink",
  "RemoteRef": "HEAD",
  "RemoteSha": "d4ce5351b4dafbb5391a672d8ad27117bec16cfb",
  "_user": "bocaccio",
  "_type": "src",
  "_file": "plink_1.5-1.tar.gz",
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  "_expires": "2027-01-12T08:12:46.000Z",
  "_created": "2026-10-04T07:54:22.000Z",
  "_published": "2026-10-04T08:12:48.903Z",
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      "date": "2011-07-25"
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      "date": "2017-04-07"
    },
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  ],
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    "as.poly.mod",
    "as.weight",
    "combine.pars",
    "drm",
    "equate",
    "get.prob",
    "gpcm",
    "grm",
    "is.irt.pars",
    "is.irt.prob",
    "is.link",
    "is.poly.mod",
    "is.sep.pars",
    "link.ability",
    "link.con",
    "link.pars",
    "mcm",
    "mixed",
    "nrm",
    "plink",
    "read.bilog",
    "read.bmirt",
    "read.erm",
    "read.icl",
    "read.ltm",
    "read.multilog",
    "read.parscale",
    "read.testfact",
    "sep.pars"
  ],
  "_datasets": [
    {
      "name": "act.mcm",
      "title": "ACT Mathematics Test 1997-1998 Multiple-Choice Model",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": true,
      "tojson": true
    },
    {
      "name": "act.nrm",
      "title": "ACT Mathematics Test 1997-1998 Nominal Response Model",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": true,
      "tojson": true
    },
    {
      "name": "dgn",
      "title": "Unidimensional Mixed-Format Item Parameters",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "KB04",
      "title": "Kolen - Brennan (2004)",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "md.mixed",
      "title": "Multidimensional Mixed-Format Tests",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "reading",
      "title": "Multi-Group Mixed-Format Reading Assessment",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "reckase9",
      "title": "Reckase MIRT Multidimensional Item Parameters",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "TK07",
      "title": "Tong - Kolen (2007)",
      "object": "plink",
      "class": [
        "list"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "plink-package",
      "title": "IRT Separate Calibration Linking Methods",
      "topics": [
        "plink-package"
      ]
    },
    {
      "page": "act.mcm",
      "title": "ACT Mathematics Test 1997-1998 Multiple-Choice Model",
      "topics": [
        "act.mcm"
      ]
    },
    {
      "page": "act.nrm",
      "title": "ACT Mathematics Test 1997-1998 Nominal Response Model",
      "topics": [
        "act.nrm"
      ]
    },
    {
      "page": "as.irt.pars",
      "title": "irt.pars objects",
      "topics": [
        "as.irt.pars",
        "as.irt.pars,data.frame,missing-method",
        "as.irt.pars,list,list-method",
        "as.irt.pars,list,matrix-method",
        "as.irt.pars,list,missing-method",
        "as.irt.pars,matrix,missing-method",
        "as.irt.pars,numeric,missing-method",
        "as.irt.pars,sep.pars,missing-method",
        "as.irt.pars-methods"
      ]
    },
    {
      "page": "as.poly.mod",
      "title": "poly.mod objects",
      "topics": [
        "as.poly.mod"
      ]
    },
    {
      "page": "as.weight",
      "title": "Calibration Weights",
      "topics": [
        "as.weight"
      ]
    },
    {
      "page": "combine.pars",
      "title": "Combine Item Parameters for Multiple Groups",
      "topics": [
        "combine.pars"
      ]
    },
    {
      "page": "dgn",
      "title": "Unidimensional Mixed-Format Item Parameters",
      "topics": [
        "dgn"
      ]
    },
    {
      "page": "drm-methods",
      "title": "Dichotomous Response Model Probabilities",
      "topics": [
        "drm",
        "drm,data.frame-method",
        "drm,irt.pars-method",
        "drm,list-method",
        "drm,matrix-method",
        "drm,numeric-method",
        "drm,sep.pars-method",
        "drm-methods"
      ]
    },
    {
      "page": "equate-methods",
      "title": "IRT True Score and Observed Score Equating",
      "topics": [
        "equate",
        "equate,irt.pars-method",
        "equate,list-method",
        "equate-methods"
      ]
    },
    {
      "page": "gpcm-methods",
      "title": "Generalized Partial Credit Model Response Probabilities",
      "topics": [
        "gpcm",
        "gpcm,data.frame,numeric-method",
        "gpcm,irt.pars,ANY-method",
        "gpcm,list,numeric-method",
        "gpcm,matrix,numeric-method",
        "gpcm,sep.pars,ANY-method",
        "gpcm-methods"
      ]
    },
    {
      "page": "grm-methods",
      "title": "Graded Response Model Probabilities",
      "topics": [
        "grm",
        "grm,data.frame,numeric-method",
        "grm,irt.pars,ANY-method",
        "grm,list,numeric-method",
        "grm,matrix,numeric-method",
        "grm,sep.pars,ANY-method",
        "grm-methods"
      ]
    },
    {
      "page": "irt.pars-class",
      "title": "Class \"irt.pars\"",
      "topics": [
        "initialize,irt.pars-method",
        "irt.pars-class"
      ]
    },
    {
      "page": "irt.prob-class",
      "title": "Class \"irt.prob\"",
      "topics": [
        "irt.prob-class"
      ]
    },
    {
      "page": "is.irt.pars",
      "title": "Identify Class",
      "topics": [
        "is.irt.pars",
        "is.irt.prob",
        "is.link",
        "is.poly.mod",
        "is.sep.pars"
      ]
    },
    {
      "page": "KB04",
      "title": "Kolen - Brennan (2004)",
      "topics": [
        "KB04"
      ]
    },
    {
      "page": "link-class",
      "title": "Class \"link\"",
      "topics": [
        "link-class"
      ]
    },
    {
      "page": "link.con",
      "title": "Extract Output Information",
      "topics": [
        "get.prob",
        "link.ability",
        "link.con",
        "link.pars"
      ]
    },
    {
      "page": "list.poly-class",
      "title": "Class Combinations",
      "topics": [
        "dat.null-class",
        "list.dat-class",
        "list.mat-class",
        "list.null-class",
        "list.num-class",
        "list.poly-class",
        "num.null-class",
        "pars.null-class"
      ]
    },
    {
      "page": "mcm-methods",
      "title": "Multiple-Choice Model Response Probabilities",
      "topics": [
        "mcm",
        "mcm,data.frame,numeric-method",
        "mcm,irt.pars,ANY-method",
        "mcm,list,numeric-method",
        "mcm,matrix,numeric-method",
        "mcm,sep.pars,ANY-method",
        "mcm-methods"
      ]
    },
    {
      "page": "md.mixed",
      "title": "Multidimensional Mixed-Format Tests",
      "topics": [
        "md.mixed"
      ]
    },
    {
      "page": "mixed-methods",
      "title": "Mixed-Format Response Probabilities",
      "topics": [
        "mixed",
        "mixed,data.frame,numeric-method",
        "mixed,irt.pars,ANY-method",
        "mixed,list,numeric-method",
        "mixed,matrix,numeric-method",
        "mixed,numeric,numeric-method",
        "mixed,sep.pars,ANY-method",
        "mixed-methods"
      ]
    },
    {
      "page": "nrm-methods",
      "title": "Nominal Response Model Probabilities",
      "topics": [
        "nrm",
        "nrm,data.frame,numeric-method",
        "nrm,irt.pars,ANY-method",
        "nrm,list,numeric-method",
        "nrm,matrix,numeric-method",
        "nrm,sep.pars,ANY-method",
        "nrm-methods"
      ]
    },
    {
      "page": "plink-methods",
      "title": "Separate Calibration",
      "topics": [
        "plink",
        "plink,irt.pars,ANY-method",
        "plink,list,data.frame-method",
        "plink,list,list-method",
        "plink,list,matrix-method",
        "plink-methods"
      ]
    },
    {
      "page": "plot.irt.prob",
      "title": "Plot Item Stuff",
      "topics": [
        "plot.irt.pars",
        "plot.irt.prob",
        "plot.list",
        "plot.sep.pars"
      ]
    },
    {
      "page": "poly.mod-class",
      "title": "Class \"poly.mod\"",
      "topics": [
        "poly.mod-class"
      ]
    },
    {
      "page": "read.bilog",
      "title": "Import Parameters from IRT Software",
      "topics": [
        "read.bilog",
        "read.bmirt",
        "read.erm",
        "read.icl",
        "read.ltm",
        "read.multilog",
        "read.parscale",
        "read.testfact"
      ]
    },
    {
      "page": "reading",
      "title": "Multi-Group Mixed-Format Reading Assessment",
      "topics": [
        "reading"
      ]
    },
    {
      "page": "reckase9",
      "title": "Reckase MIRT Multidimensional Item Parameters",
      "topics": [
        "reckase9"
      ]
    },
    {
      "page": "sep.pars-class",
      "title": "Class \"sep.pars\"",
      "topics": [
        "sep.pars-class"
      ]
    },
    {
      "page": "sep.pars-methods",
      "title": "Separate Item Parameters",
      "topics": [
        "sep.pars",
        "sep.pars,data.frame-method",
        "sep.pars,irt.pars-method",
        "sep.pars,list-method",
        "sep.pars,matrix-method",
        "sep.pars,numeric-method",
        "sep.pars-methods"
      ]
    },
    {
      "page": "summary.irt.pars",
      "title": "Summarize Item Parameters/plink Output",
      "topics": [
        "summary.irt.pars",
        "summary.link",
        "summary.list",
        "summary.sep.pars"
      ]
    },
    {
      "page": "TK07",
      "title": "Tong - Kolen (2007)",
      "topics": [
        "TK07"
      ]
    }
  ],
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    "MASS",
    "statmod"
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  "_vignettes": [
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      "source": "plink-UD.Rnw",
      "filename": "plink-UD.pdf",
      "title": "plink: An R Package for Linking Mixed-Format Tests Using IRT-Based Methods",
      "engine": "utils::Sweave",
      "headings": [
        "Introduction",
        "Models and methods",
        "Preparing the data",
        "Running the calibration",
        "Additional features",
        "Related software"
      ],
      "created": "2017-04-07 16:05:38",
      "modified": "2017-04-07 16:05:38",
      "commits": 1
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