iccPlot
(Package: ifaTools) :
Plot expected and observed table from SitemFit
WARNING: This function is under development. The API may change in a future release.
● Data Source:
CranContrib
● Keywords:
● Alias: iccPlot
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univariatePrior
(Package: ifaTools) :
Univariate priors commonly used in IFA models
The returned model evaluates to the fit of the priors in deviance (-2 log likelihood) units. The analytic gradient and Hessian are included for quick optimization using Newton-Raphson.
● Data Source:
CranContrib
● Keywords:
● Alias: univariatePrior
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replicateModelBy
(Package: ifaTools) :
Replicate a model for each group of data
The reference group is fixed to a zero mean and identity covariance matrix.
● Data Source:
CranContrib
● Keywords:
● Alias: replicateModelBy
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addExploratoryFactors
(Package: ifaTools) :
Adds exploratory factors to a single factor model
Adds exploratory factors to a single factor model
● Data Source:
CranContrib
● Keywords:
● Alias: addExploratoryFactors
●
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Categories are placed at the mean score of the examinees who picked that category.
● Data Source:
CranContrib
● Keywords:
● Alias: itemResponseMap
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plotInformation
(Package: ifaTools) :
Plot item information in the latent distribution
For multidimensional items, you will need to supply a basis vector. This vector is normalized to unit length.
● Data Source:
CranContrib
● Keywords:
● Alias: plotInformation
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modelBuilder
(Package: ifaTools) :
A Shiny app for building IFA models
A Shiny app for building IFA models
● Data Source:
CranContrib
● Keywords:
● Alias: modelBuilder
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uniquenessPrior
(Package: ifaTools) :
Uniqueness prior to assist in item factor analysis
To prevent Heywood cases, Bock, Gibbons, & Muraki (1988) suggested a beta prior on the uniqueness (Equations 43-46). The analytic gradient and Hessian are included for quick optimization using Newton-Raphson.
● Data Source:
CranContrib
● Keywords:
● Alias: uniquenessPrior
●
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itemModelExplorer
(Package: ifaTools) :
A Shiny app to experiment with item models
A Shiny app to experiment with item models
● Data Source:
CranContrib
● Keywords:
● Alias: itemModelExplorer
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SitemPlot
(Package: ifaTools) :
Plot expected and observed table from SitemFit
Plot expected and observed table from SitemFit
● Data Source:
CranContrib
● Keywords:
● Alias: SitemPlot
●
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