# Marginal Maximum Likelihood Estimation for Item Response Models

## Documentation for package ‘IRTC’ version 1.1.1

- DESCRIPTION file.
- Package NEWS.

## Help Pages

IRTC-package | Marginal Maximum Likelihood Estimation for Item Response Models
anova.irtc | Marginal Maximum Likelihood Estimation of Fixed-Slope Item Response Models
data.gpcm | Simulated Polytomous Item Response Data
data.mc | Simulated Multiple-Choice Item Response Data
data.sim.rasch | Simulated Dichotomous Rasch Data
IRTC | Marginal Maximum Likelihood Estimation for Item Response Models
irtc | One-Stop Item Response Model Estimation
irtc.mml | Marginal Maximum Likelihood Estimation of Fixed-Slope Item Response Models
irtc.mml.2pl | Marginal Maximum Likelihood Estimation of Slope (Discrimination) Item Response Models
irtc_align_q | Read a Q Matrix from a File and Align It with the Response Data
irtc_check_data | Pre-Estimation Data Diagnostics
irtc_ctt | Classical Test Theory Item Statistics
irtc_excel | Export Three Excel Result Workbooks
irtc_itemfit | Item Fit Statistics (Infit and Outfit)
irtc_json | Machine-Readable Results with a Stable Schema
irtc_lang | Output Language of the IRTC Usability Layer
irtc_param_table | Export Three Excel Result Workbooks
irtc_person_table | Export Three Excel Result Workbooks
irtc_quality | Plain-Language Item Quality Ratings
irtc_quality_thresholds | Plain-Language Item Quality Ratings
irtc_read | Read and Clean Item Response Data from Many Formats
irtc_read_q | Read a Q Matrix from a File and Align It with the Response Data
irtc_report | Generate a Word or HTML Analysis Report
irtc_results | Machine-Readable Results with a Stable Schema
irtc_score | Score Raw Responses with an Answer Key or Scoring Rules
logLik.irtc | Marginal Maximum Likelihood Estimation of Fixed-Slope Item Response Models
plain_summary | Plain-Language Layered Summary of a Fitted Model
plot.irtc | Diagnostic Plots for Fitted Item Response Models
print.irtc | Marginal Maximum Likelihood Estimation of Fixed-Slope Item Response Models
print.irtc_check | Pre-Estimation Data Diagnostics
print.irtc_ctt | Classical Test Theory Item Statistics
print.irtc_data | Read and Clean Item Response Data from Many Formats
print.irtc_itemfit | Item Fit Statistics (Infit and Outfit)
print.irtc_qmatrix | Read a Q Matrix from a File and Align It with the Response Data
print.irtc_quality | Plain-Language Item Quality Ratings
print.irtc_results | Machine-Readable Results with a Stable Schema
summary.irtc | Marginal Maximum Likelihood Estimation of Fixed-Slope Item Response Models