{
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  "Package": "easyRasch2",
  "Title": "Psychometric Analysis with Rasch Measurement Theory",
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  "Authors@R": "c(\nperson(\"Magnus\", \"Johansson\",\nrole = c(\"aut\", \"cre\"),\nemail = \"pgmj@pm.me\",\ncomment = c(ORCID = \"0000-0003-1669-592X\")),\nperson(\"Nicklas\", \"Korsell\",\nrole = \"ctb\",\ncomment = \"PCM simulation code\"),\nperson(\"Mirka\", \"Henninger\",\nrole = \"ctb\",\ncomment = c(ORCID = \"0000-0003-4676-2361\",\n\"MH / partial-gamma effect-size and ETS-classification algorithms in dif_tree.R, adapted under MIT licence from the raschtreeMH and effecttree packages\")),\nperson(\"Jan\", \"Radek\",\nrole = \"ctb\",\ncomment = c(ORCID = \"0009-0003-8842-9206\",\n\"partial-gamma effect-size and ETS-classification algorithms in dif_tree.R, adapted under MIT licence from the effecttree package\")))",
  "Description": "Streamlines reproducible Rasch measurement theory analyses\nfor ordinal item-response data, combining estimation routines\nfrom 'eRm', 'psychotools', 'mirt', 'iarm', and 'lavaan' with\nconsistent diagnostic, plotting, and reporting layers. Covers\nthe four basic psychometric criteria summarised by Christensen\net al. (2021) <doi:10.1111/sms.13908> -- unidimensionality,\nlocal independence, ordered response category thresholds, and\ninvariance across subgroups -- together with item fit,\ntargeting, reliability, category functioning, and descriptive\nitem-response plots. A distinguishing feature is the use of\nsimulation-based critical values to replace rule-of-thumb\ncutoffs for conditional infit mean-square, Yen's Q3\nlocal-dependence statistic, the largest residual-PCA\neigenvalue, and ordinal CFA fit indices. Outputs are\nknitr::kable() tables and 'ggplot2' figures suitable for direct\ninclusion in 'Quarto' and 'R Markdown' reports.",
  "License": "GPL (>= 3)",
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  "URL": "https://github.com/pgmj/easyRasch2,\nhttps://pgmj.github.io/easyRasch2/",
  "BugReports": "https://github.com/pgmj/easyRasch2/issues",
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    "Date": "2026-06-08 20:31:35 UTC",
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  "Author": "Magnus Johansson [aut, cre] (ORCID:\n<https://orcid.org/0000-0003-1669-592X>), Nicklas Korsell [ctb]\n(PCM simulation code), Mirka Henninger [ctb] (ORCID:\n<https://orcid.org/0000-0003-4676-2361>, MH / partial-gamma\neffect-size and ETS-classification algorithms in dif_tree.R,\nadapted under MIT licence from the raschtreeMH and effecttree\npackages), Jan Radek [ctb] (ORCID:\n<https://orcid.org/0009-0003-8842-9206>, partial-gamma\neffect-size and ETS-classification algorithms in dif_tree.R,\nadapted under MIT licence from the effecttree package)",
  "Maintainer": "Magnus Johansson <pgmj@pm.me>",
  "Repository": "https://cran.r-universe.dev",
  "Date/Publication": "2026-06-08 17:50:12 UTC",
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      "title": "PHQ-9 Depression Screener (NHANES Subsample)",
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    {
      "page": "RMdifGamma",
      "title": "Partial Gamma DIF Analysis",
      "topics": [
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      "title": "Simulation-Based Partial Gamma DIF Cutoff Determination",
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      "title": "Plot Distribution of Simulated Partial Gamma DIF Values",
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      "title": "DIF analysis via Andersen's likelihood-ratio test",
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      "title": "Tree-based DIF analysis with effect-size classification",
      "topics": [
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      "page": "RMdimCFACutoff",
      "title": "Posterior-predictive CFA fit-index cutoffs under PCM unidimensionality",
      "topics": [
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      "title": "Plot observed CFA fit indices against the simulated null distribution",
      "topics": [
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    {
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      "title": "Standardised Residuals from the Joint Subscore Distribution",
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      "title": "PCA of Standardized Rasch Residuals",
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      "page": "RMdimResidualPCACutoff",
      "title": "Simulation-based Cutoff for First-Contrast Eigenvalue",
      "topics": [
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    {
      "page": "RMitemCatProb",
      "title": "Item Category Probability Curves",
      "topics": [
        "RMitemCatProb"
      ]
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    {
      "page": "RMitemHierarchy",
      "title": "Item-Threshold Hierarchy Plot",
      "topics": [
        "RMitemHierarchy"
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      "page": "RMitemICCPlot",
      "title": "Conditional Item Characteristic Curves",
      "topics": [
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      "page": "RMitemInfit",
      "title": "Conditional Item Infit MSQ",
      "topics": [
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      "page": "RMitemInfitCutoff",
      "title": "Simulation-Based Infit MSQ Cutoff Determination",
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    },
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      "page": "RMitemInfitCutoffMI",
      "title": "Simulation-Based Infit MSQ Cutoff Determination for Multiply Imputed Data",
      "topics": [
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    },
    {
      "page": "RMitemInfitCutoffPlot",
      "title": "Plot Distribution of Simulated Infit and Outfit MSQ Values",
      "topics": [
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      "page": "RMitemInfitMI",
      "title": "Conditional Item Infit MSQ for Multiply Imputed Data",
      "topics": [
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    {
      "page": "RMitemRestscore",
      "title": "Item Restscore Analysis",
      "topics": [
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      "page": "RMlocdepGamma",
      "title": "Partial Gamma Local Dependence Analysis",
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    {
      "page": "RMlocdepGammaCutoff",
      "title": "Simulation-Based Partial Gamma LD Cutoff Determination",
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    {
      "page": "RMlocdepGammaPlot",
      "title": "Plot Distribution of Simulated Partial Gamma LD Values",
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      "title": "Plot Distribution of Simulated Q3 Residual Correlations",
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      "headings": [
        "Overview",
        "Data",
        "Descriptive plots",
        "1. Unidimensionality",
        "Conditional infit MSQ",
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