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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

5,145

Version

2.12-18

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

May 25th, 2018

Functions in TAM (2.12-18)

cfa.extract.itempars

Extracting Item Parameters from a Fitted cfa Object in lavaan

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

Some C-Test Datasets

Dataset from Janssen and Geiser (2010)

Dataset Numeracy

Bifactor Model and Exploratory Factor Analysis

Dataset with Ordered Indicators

Classical Test Theory Based Statistics and Plots

Dataset with Raw and Scored Responses from Multiple Choice Items

Standard Error Estimation

Item Infit and Outfit Statistic

More Datasets and Examples (Similar to ConQuest Examples)

Joint Maximum Likelihood Estimation

Reliability Estimation in TAM

Plausible Value Imputation

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value

Datasets data.ex in TAM Package

data.fims.Aus.Jpn.scored

Dataset FIMS Study with Responses of Australian and Japanese Students

Parsing a String with DO Statements

Dataset from Geiser et al. (2006)

Utility Functions in TAM

Test Analysis Modules

Latent Regression Model

Linking of Fitted Unidimensional Item Response Models in TAM

data.timssAusTwn

Dataset TIMSS 2011 of Australian and Taiwanese Students

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

Generation of Design Matrices

Simulated Multifaceted Data

Person Outfit and Infit Statistics

Model Fit Statistics in TAM

Conversion of Plausible Value Object into Datalist

Descriptive Statistics for Weighted Data

Simulated Rasch data

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

Plot Function for Unidimensional Item Response Models

plotDevianceTAM

Deviance Plot for TAM Objects

Expected Values and Predicted Probabilities for Fitted TAM Models

Calculation of Thurstonian Thresholds

Missing Data Patterns

Item Response Function for the 3PL Model

3PL Structured Item Response Model in TAM

Weighted Likelihood Estimation and Maximum Likelihood Estimation of Person Parameters

Function for Parsing TAM Input

Wrapper Function for TAM Language

Test Analysis Modules: Marginal Maximum Likelihood Estimation

S3 Method for Descriptive Statistics of Objects

Extracting Item Response Dataset

Function for Drawing Plausible Values

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

IRT.frequencies.tam

Observed and Expected Frequencies for Univariate and Bivariate Distributions

IRT.informationCurves

Item and Test Information Curve

S3 Method for Standardizations and Transformations of Variables

IRT.expectedCounts

Extracting Expected Counts

IRT.factor.scores

Extracting Factor Scores in TAM

Defunct TAM Functions

Extracting Item Response Functions

Thurstonian Thresholds and Wright Map for Item Response Models

Extracting Individual Likelihood and Individual Posterior

IRT.itemfit.tam

RMSD Item Fit Statistics for TAM Objects

Linear Approximation of a Confirmatory Factor Analysis

Residuals in an IRT Model

Simulating Item Response Models