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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@leibniz-ipn.de. Please always provide a minimal dataset, necessary to demonstrate the problem, a minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and all necessary information on the used librarys, the R version, and the OS it is run on, perhaps a sessionInfo().

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")

or alternatively use

utils::install.packages('TAM', repos = c('https://alexanderrobitzsch.r-universe.dev', 'https://cloud.r-project.org'))

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Version

Install

install.packages('TAM')

Monthly Downloads

3,446

Version

4.2-21

License

GPL (>= 2)

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/alexanderrobitzsch/TAM

Homepage

http://www.edmeasurementsurveys.com/TAM/Tutorials/

Maintainer

Alexander Robitzsch

Last Published

February 19th, 2024

Functions in TAM (4.2-21)

Simulating Item Response Models

IRT.itemfit.tam

RMSD Item Fit Statistics for TAM Objects

Linear Approximation of a Confirmatory Factor Analysis

IRTLikelihood.ctt

Computes Individual Likelihood from Classical Test Theory Estimates

Residuals in an IRT Model

Extracting Individual Likelihood and Individual Posterior

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

Thurstonian Thresholds and Wright Map for Item Response Models

S3 Method for Standardizations and Transformations of Variables

IRTLikelihood.cfa

Individual Likelihood for Confirmatory Factor Analysis

Defunct TAM Functions

data.fims.Aus.Jpn.scored

Dataset FIMS Study with Responses of Australian and Japanese Students

Datasets data.ex in TAM Package

Some C-Test Datasets

More Datasets and Examples (Similar to ConQuest Examples)

Generation of Design Matrices

Utility Functions in TAM

Simulated Rasch data

data.timssAusTwn

Dataset TIMSS 2011 of Australian and Taiwanese Students

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value

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

Reliability Estimation in TAM

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

Dataset with Ordered Indicators

Dataset from Geiser et al. (2006)

Parsing a String with DO Statements

cfa.extract.itempars

Extracting Item Parameters from a Fitted cfa Object in lavaan

Bifactor Model and Exploratory Factor Analysis

Item Infit and Outfit Statistic

Latent Regression Model

Classical Test Theory Based Statistics and Plots

Expected Values and Predicted Probabilities for Fitted TAM Models

tools:::Rd_package_title("TAM")

Dataset with Raw and Scored Responses from Multiple Choice Items

Dataset from Janssen and Geiser (2010)

Simulated Multifaceted Data

Dataset Numeracy

plotDevianceTAM

Deviance Plot for TAM Objects

Plot Function for Unidimensional Item Response Models

Joint Maximum Likelihood Estimation

S3 Method for Descriptive Statistics of Objects

IRT.frequencies.tam

Observed and Expected Frequencies for Univariate and Bivariate Distributions

IRT.expectedCounts

Extracting Expected Counts

Extracting Item Response Dataset

IRT.informationCurves

Item and Test Information Curve

Function for Drawing Plausible Values

Cross-Validation of a Fitted IRT Model

Wright Map for Item Response Models by Using the WrightMap Package

Extracting Item Response Functions

IRT.factor.scores

Extracting Factor Scores in TAM