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TAM

Test Analysis Modules

If you use TAM and have suggestions for improvement or have found bugs, please email me at robitzsch@ipn.uni-kiel.de.

Manual

The manual may be found here https://alexanderrobitzsch.github.io/TAM/

CRAN version

The official version of TAM is hosted on CRAN and may be found here. The CRAN version can be installed from within R using:

utils::install.packages("TAM")

GitHub version

The version hosted here is the development version of TAM. The GitHub version can be installed using devtools as:

devtools::install_github("alexanderrobitzsch/TAM")

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Version

Install

install.packages('TAM')

Monthly Downloads

3,429

Version

3.7-16

License

GPL (>= 2)

Issues

10

Pull Requests

0

Stars

16

Forks

10

Maintainer

Alexander Robitzsch

Last Published

June 25th, 2021

Functions in TAM (3.7-16)

IRT.frequencies.tam

Observed and Expected Frequencies for Univariate and Bivariate Distributions
DescribeBy

S3 Method for Descriptive Statistics of Objects
IRT.drawPV

Function for Drawing Plausible Values
IRT.WrightMap

Wright Map for Item Response Models by Using the WrightMap Package
IRT.expectedCounts

Extracting Expected Counts
IRT.factor.scores

Extracting Factor Scores in TAM
IRT.irfprob

Extracting Item Response Functions
IRT.cv

Cross-Validation of a Fitted IRT Model
IRT.informationCurves

Item and Test Information Curve
IRT.threshold

Thurstonian Thresholds and Wright Map for Item Response Models
anova-logLik

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value
IRT.simulate

Simulating Item Response Models
cfa.extract.itempars

Extracting Item Parameters from a Fitted cfa Object in lavaan
IRTLikelihood.ctt

Computes Individual Likelihood from Classical Test Theory Estimates
IRT.data.tam

Extracting Item Response Dataset
IRT.likelihood

Extracting Individual Likelihood and Individual Posterior
TAM-defunct

Defunct TAM Functions
TAM-package

TAM
IRT.itemfit.tam

RMSD Item Fit Statistics for TAM Objects
IRT.truescore

Converts a \(\theta\) Score into a True Score \(\tau ( \theta)\)
Scale

S3 Method for Standardizations and Transformations of Variables
data.sim.rasch

Simulated Rasch data
IRTLikelihood.cfa

Individual Likelihood for Confirmatory Factor Analysis
data.janssen

Dataset from Janssen and Geiser (2010)
data.mc

Dataset with Raw and Scored Responses from Multiple Choice Items
data.timssAusTwn

Dataset TIMSS 2011 of Australian and Taiwanese Students
data.ctest

Some C-Test Datasets
data.cqc

More Datasets and Examples (Similar to ConQuest Examples)
lavaanify.IRT

Slight Extension of the lavaan Syntax, with Focus on Item Response Models
msq.itemfit

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

Residuals in an IRT Model
TAM-utilities

Utility Functions in TAM
IRT.linearCFA

Linear Approximation of a Confirmatory Factor Analysis
WLErel

Reliability Estimation in TAM
tam.ctt

Classical Test Theory Based Statistics and Plots
predict

Expected Values and Predicted Probabilities for Fitted TAM Models
data.fims.Aus.Jpn.scored

Dataset FIMS Study with Responses of Australian and Japanese Students
data.examples

Datasets data.ex in TAM Package
data.geiser

Dataset from Geiser et al. (2006)
data.gpcm

Dataset with Ordered Indicators
tam.jml

Joint Maximum Likelihood Estimation
plot.tam

Plot Function for Unidimensional Item Response Models
tam.latreg

Latent Regression Model
plotDevianceTAM

Deviance Plot for TAM Objects
data.sim.mfr

Simulated Multifaceted Data
data.numeracy

Dataset Numeracy
doparse

Parsing a String with DO Statements
designMatrices

Generation of Design Matrices
tam.fa

Bifactor Model and Exploratory Factor Analysis
tam.fit

Item Infit and Outfit Statistic