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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.

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

2,900

Version

3.1-45

License

GPL (>= 2)

Issues

7

Pull Requests

0

Stars

16

Forks

9

Maintainer

Alexander Robitzsch

Last Published

March 18th, 2019

Functions in TAM (3.1-45)

IRT.expectedCounts

Extracting Expected Counts
Scale

S3 Method for Standardizations and Transformations of Variables
TAM-defunct

Defunct TAM Functions
WLErel

Reliability Estimation in TAM
anova-logLik

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value
data.mc

Dataset with Raw and Scored Responses from Multiple Choice Items
IRT.WrightMap

Wright Map for Item Response Models by Using the WrightMap Package
DescribeBy

S3 Method for Descriptive Statistics of Objects
data.numeracy

Dataset Numeracy
IRT.likelihood

Extracting Individual Likelihood and Individual Posterior
IRT.linearCFA

Linear Approximation of a Confirmatory Factor Analysis
TAM-package

TAM
TAM-utilities

Utility Functions in TAM
tam.latreg

Latent Regression Model
data.timssAusTwn

Dataset TIMSS 2011 of Australian and Taiwanese Students
designMatrices

Generation of Design Matrices
tam.linking

Linking of Fitted Unidimensional Item Response Models in TAM
plotDevianceTAM

Deviance Plot for TAM Objects
IRT.frequencies.tam

Observed and Expected Frequencies for Univariate and Bivariate Distributions
predict

Expected Values and Predicted Probabilities for Fitted TAM Models
IRT.informationCurves

Item and Test Information Curve
data.ctest

Some C-Test Datasets
data.examples

Datasets data.ex in TAM Package
IRT.residuals

Residuals in an IRT Model
IRT.simulate

Simulating Item Response Models
data.sim.mfr

Simulated Multifaceted Data
data.sim.rasch

Simulated Rasch data
tam.ctt

Classical Test Theory Based Statistics and Plots
data.fims.Aus.Jpn.scored

Dataset FIMS Study with Responses of Australian and Japanese Students
tam.fa

Bifactor Model and Exploratory Factor Analysis
data.geiser

Dataset from Geiser et al. (2006)
tam.fit

Item Infit and Outfit Statistic
tam.jml

Joint Maximum Likelihood Estimation
IRT.irfprob

Extracting Item Response Functions
IRT.itemfit.tam

RMSD Item Fit Statistics for TAM Objects
IRT.threshold

Thurstonian Thresholds and Wright Map for Item Response Models
IRT.truescore

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

Parsing a String with DO Statements
lavaanify.IRT

Slight Extension of the lavaan Syntax, with Focus on Item Response Models
IRT.data.tam

Extracting Item Response Dataset
IRT.drawPV

Function for Drawing Plausible Values
IRTLikelihood.cfa

Individual Likelihood for Confirmatory Factor Analysis
IRTLikelihood.ctt

Computes Individual Likelihood from Classical Test Theory Estimates
cfa.extract.itempars

Extracting Item Parameters from a Fitted cfa Object in lavaan
data.cqc

More Datasets and Examples (Similar to ConQuest Examples)
data.gpcm

Dataset with Ordered Indicators
data.janssen

Dataset from Janssen and Geiser (2010)
msq.itemfit

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

Plot Function for Unidimensional Item Response Models
IRT.factor.scores

Extracting Factor Scores in TAM