TAM4.2-21 package

Test Analysis Modules

anova.tam

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value

cfa.extract.itempars

Extracting Item Parameters from a Fitted cfa Object in lavaan

data.cqc

More Datasets and Examples (Similar to ConQuest Examples)

data.ctest

Some C-Test Datasets

data.examples

Datasets data.ex in TAM Package

data.fims.Aus.Jpn

Dataset FIMS Study with Responses of Australian and Japanese Students

DescribeBy

S3 Method for Descriptive Statistics of Objects

designMatrices

Generation of Design Matrices

doparse

Parsing a String with DO Statements

IRT.cv

Cross-Validation of a Fitted IRT Model

IRT.data.tam

Extracting Item Response Dataset

IRT.drawPV

Function for Drawing Plausible Values

IRT.expectedCounts.tam

Extracting Expected Counts

IRT.factor.scores.tam

Extracting Factor Scores in TAM

IRT.frequencies.tam

Observed and Expected Frequencies for Univariate and Bivariate Distrib...

IRT.informationCurves

Item and Test Information Curve

IRT.irfprob.tam

Extracting Item Response Functions

IRT.itemfit

RMSD Item Fit Statistics for TAM Objects

IRT.likelihood.tam

Extracting Individual Likelihood and Individual Posterior

IRT.linearCFA

Linear Approximation of a Confirmatory Factor Analysis

IRT.residuals

Residuals in an IRT Model

IRT.simulate

Simulating Item Response Models

IRT.threshold

Thurstonian Thresholds and Wright Map for Item Response Models

IRT.truescore

Converts a θ\theta Score into a True Score τ(θ)\tau ( \theta)

IRT.WrightMap

Wright Map for Item Response Models by Using the WrightMap Package

IRTLikelihood.cfa

Individual Likelihood for Confirmatory Factor Analysis

IRTLikelihood.ctt

Computes Individual Likelihood from Classical Test Theory Estimates

lavaanify.IRT

Slight Extension of the lavaan Syntax, with Focus on Item Response M...

msq.itemfit

Mean Squared Residual Based Item Fit Statistics (Infit, Outfit)

plot.tam

Plot Function for Unidimensional Item Response Models

plotDevianceTAM

Deviance Plot for TAM Objects

predict

Expected Values and Predicted Probabilities for Fitted TAM Models

Scale

S3 Method for Standardizations and Transformations of Variables

TAM-defunct

Defunct TAM Functions

TAM-package

tools:::Rd_package_title("TAM")

TAM-utilities

Utility Functions in TAM

tam.ctt

Classical Test Theory Based Statistics and Plots

tam.fa

Bifactor Model and Exploratory Factor Analysis

tam.fit

Item Infit and Outfit Statistic

tam.jml

Joint Maximum Likelihood Estimation

tam.latreg

Latent Regression Model

tam.linking

Linking of Fitted Unidimensional Item Response Models in TAM

tam.mml.3pl

3PL Structured Item Response Model in TAM

tam.mml

Test Analysis Modules: Marginal Maximum Likelihood Estimation

tam.modelfit

Model Fit Statistics in TAM

tam.np

Unidimensional Non- and Semiparametric Item Response Model

tam.personfit

Person Outfit and Infit Statistics

tam.pv

Plausible Value Imputation

tam.se

Standard Error Estimation

tam.threshold

Calculation of Thurstonian Thresholds

tam.wle

Weighted Likelihood Estimation and Maximum Likelihood Estimation of Pe...

tam_downcode

Downcoding an Item Response Dataset

tam_irf_3pl

Item Response Function for the 3PL Model

tam_NA_pattern

Missing Data Patterns

tamaan

Wrapper Function for TAM Language

tamaanify

Function for Parsing TAM Input

tampv2datalist

Conversion of Plausible Value Object into Datalist

weighted_Stats

Descriptive Statistics for Weighted Data

WLErel

Reliability Estimation in TAM

Includes marginal maximum likelihood estimation and joint maximum likelihood estimation for unidimensional and multidimensional item response models. The package functionality covers the Rasch model, 2PL model, 3PL model, generalized partial credit model, multi-faceted Rasch model, nominal item response model, structured latent class model, mixture distribution IRT models, and located latent class models. Latent regression models and plausible value imputation are also supported. For details see Adams, Wilson and Wang, 1997 <doi:10.1177/0146621697211001>, Adams, Wilson and Wu, 1997 <doi:10.3102/10769986022001047>, Formann, 1982 <doi:10.1002/bimj.4710240209>, Formann, 1992 <doi:10.1080/01621459.1992.10475229>.

  • Maintainer: Alexander Robitzsch
  • License: GPL (>= 2)
  • Last published: 2024-02-19