Unidimensional Item Response Theory Modeling
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Documentation for package ‘irtplay’ version 1.6.5
Help Pages
| irtplay-package | irtplay: Unidimensional Item Response Theory Modeling |
| 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 |
| catsib | CATSIB DIF detection procedure |
| covirt | Asymptotic variance-covariance matrices of item parameter estimates |
| drm | Dichotomous Response Model Probabilities |
| est_irt | Item parameter estimation using MMLE-EM algorithm |
| est_item | Fixed ability parameter calibration |
| est_mg | Multiple-group item calibration using MMLE-EM algorithm |
| est_score | Estimate examinees' ability (proficiency) parameters |
| est_score.default | Estimate examinees' ability (proficiency) parameters |
| est_score.est_irt | Estimate examinees' ability (proficiency) parameters |
| gen.weight | Generate Weights |
| getirt | Extract various elements from 'est_irt' or 'est_item' objects |
| getirt.est_irt | Extract various elements from 'est_irt' or 'est_item' objects |
| getirt.est_item | Extract various elements from 'est_irt' or 'est_item' objects |
| getirt.est_mg | Extract various elements from 'est_irt' or 'est_item' objects |
| irtfit | Traditional IRT item fit statistics |
| irtfit.default | Traditional IRT item fit statistics |
| irtfit.est_irt | Traditional IRT item fit statistics |
| irtfit.est_item | Traditional IRT item fit statistics |
| llike_item | Loglikelihood of Items |
| llike_score | Loglikelihood of ability |
| LSAT6 | LSAT6 data |
| 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 |
| post_den | Updated prior (a.k.a. posterior) latent ability distribution |
| rdif | IRT residual-based DIF (RDIF) detection framework |
| rdif.default | IRT residual-based DIF (RDIF) detection framework |
| rdif.est_irt | IRT residual-based DIF (RDIF) detection framework |
| rdif.est_item | IRT residual-based DIF (RDIF) detection framework |
| run_flexmirt | Run flexMIRT through R |
| shape_df | Create a data frame of item metadata |
| simCAT_DC | Simulated single-item format CAT Data |
| simCAT_MX | Simulated mixed-item format CAT Data |
| simdat | Simulated Response Data |
| simMG | Simulated multiple-group data |
| summary | Summary of item calibration |
| summary.est_irt | Summary of item calibration |
| summary.est_item | Summary of item calibration |
| summary.est_mg | Summary of item calibration |
| sx2_fit | S-X2 fit statistic |
| sx2_fit.default | S-X2 fit statistic |
| sx2_fit.est_irt | 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_irt | 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_irt | Compute Item/Test Characteristic Functions |
| traceline.est_item | Compute Item/Test Characteristic Functions |
| write.flexmirt | Write a "-prm.txt" file for flexMIRT |