Testlet Item Response Theory

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Documentation for package ‘tirt’ version 0.4.0

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

Help Pages

binary_irt	Binary (Dichotomous) Item Response Theory Estimation Using Likelihood or Bayesian
dif	Differential Item Functioning (Mantel-Haenszel and Logistic Regression)
ela1	Mixed-Format English Language Arts (ELA) Assessment Data (Form 1)
ela2	Mixed-Format English Language Arts (ELA) Assessment Data (Form 2)
ela3	Large-Scale Mixed-Format English Language Arts (ELA) Assessment Data (Form 3)
ela3_testmap	Large-Scale Mixed-Format English Language Arts (ELA) Assessment Data Testmap (Form 3 Testmap)
equate_irt	Item Response Theory Equating / Linking
fixed_item	Fixed Item Calibration
fix_person	Fixed Person Calibration with or without Covariate
irt_trt	Joint Item Response Theory and Testlet Response Theory Estimation (Dichotomous & Polytomous)
item_fit	Item Fit Statistics (Infit and Outfit)
item_info	Item Information Function
ld_stats	Local Dependence Statistics (Yen's Q3)
mirt_binary	Multidimensional Binary Item Response Theory Estimation
mixed_irt	Mixed Item Response Model Estimation (Dichotomous & Polytomous) with Prior Support
mixture_irt	Mixture Item Response Theory Model (Latent-Class Rasch / 2PL)
person_fit	Person Fit Statistics (Standardized Log-Likelihood, lz)
polytomous_irt	Polytomous Item Response Theory Estimation Using Likelihood or Bayesian
reliability	Test Reliability Indices
score_table	Summed-Score to Theta Conversion Table
sim_irt	Simulate Item Response Theory Data
sim_mirt	Simulate Multidimensional Item Response Theory Data
sim_tirt	Simulate Mixed IRT and Testlet (TRT) Data
sim_trt	Simulate Testlet Response Theory Data (Vector Supported Version)
tcc	Test and Item Characteristic Curves (Expected Scores)
test_info	Test Information Function and Conditional Standard Error
trt_binary	Unidimensional Binary (Dichotomous) Testlet Response Theory Estimation
trt_poly	Unidimensional Polytomous Testlet Response Theory Estimation