Evaluation of Model-Data Fit in Item Response Theory (IRT) and Useful Functions Related to IRT

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Documentation for package ‘irtplay’ version 1.2.0

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irtplay-package irtplay: Evaluation of model-data fit in Item Response Theory (IRT) and useful functions related to IRT
bind.fill Bind Fill
bring.bilog Import Item and Ability Parameters from IRT Software
bring.flexmirt Import Item and Ability Parameters from IRT Software
bring.mirt Import Item and Ability Parameters from IRT Software
bring.parscale Import Item and Ability Parameters from IRT Software
covirt Asymptotic variance-covariance matrices of item parameter estimates
drm Dichotomous Response Model Probabilities
est_item Fixed effect item parameter calibration
est_score Estimate examinees' ability (proficiency) parameters
gen.weight Generate Weights
irtfit Traditional IRT item fit statistics
irtfit.default Traditional IRT item fit statistics
irtfit.est_item Traditional IRT item fit statistics
llike_item Loglikelihood of Items
lwrc Lord-Wingersky Recursion Formula
plm Polytomous Response Model Probabilities (GRM and GPCM)
plot.irtfit Draw raw and standardized residual plots
plot.test.info Plot Item and Test Information Functions
plot.traceline Plot ICC and TCC
shape_df Create a data.frame of Item Meta Data
simCAT_DC Simulated single-item format CAT Data
simCAT_MX Simulated mixed-item format CAT Data
simdat Simulated Response Data
sx2_fit S-X2 fit statistic
sx2_fit.default S-X2 fit statistic
sx2_fit.est_item S-X2 fit statistic
test.info Item and Test Information Function
test.info.default Item and Test Information Function
test.info.est_item Item and Test Information Function
traceline Compute Item/Test Characteristic Functions
traceline.default Compute Item/Test Characteristic Functions
traceline.est_item Compute Item/Test Characteristic Functions
write.flexmirt Write a "-prm.txt" file for flexMIRT