Parameter Estimation of Item Response Theory with Estimation of Latent Distribution

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Documentation for package ‘IRTest’ version 1.7.0

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

DataGeneration	Generating artificial item response data
dist2	Re-parameterized two-component normal mixture distribution
GHc	Gauss-Hermite constants
IRTest_Dich	Item and ability parameters estimation for dichotomous items
IRTest_Mix	Item and ability parameters estimation for a mixed-format item response data
IRTest_Poly	Item and ability parameters estimation for polytomous items
item_fit	Item fit diagnostics
original_par_2GM	Recovering original parameters of two-component Gaussian mixture distribution from re-parameterized parameters
plot.irtest	Plotting the estimated latent distribution
plot_item	Plot of item response function
print.irtest	Print of the result
print.irtest_summary	Print of the summary
reliability	Marginal reliability coefficient of IRT
summary.irtest	Summary of the results