TAM

S3 Method for Descriptive Statistics of Objects

Wright Map for Item Response Models by Using the WrightMap Package

Cross-Validation of a Fitted IRT Model

Extracting Item Response Dataset

Function for Drawing Plausible Values

Extracting Expected Counts

Extracting Factor Scores in TAM

Observed and Expected Frequencies for Univariate and Bivariate Distributions

Item and Test Information Curve

Extracting Item Response Functions

RMSD Item Fit Statistics for TAM Objects

Extracting Individual Likelihood and Individual Posterior

Linear Approximation of a Confirmatory Factor Analysis

Residuals in an IRT Model

Simulating Item Response Models

Thurstonian Thresholds and Wright Map for Item Response Models

Converts a θ Score into a True Score τ ( θ)

Individual Likelihood for Confirmatory Factor Analysis

Computes Individual Likelihood from Classical Test Theory Estimates

S3 Method for Standardizations and Transformations of Variables

Defunct TAM Functions

Test Analysis Modules

Utility Functions in TAM

Reliability Estimation in TAM

Likelihood Ratio Test for Model Comparisons and Log-Likelihood Value

Extracting Item Parameters from a Fitted cfa Object in lavaan

More Datasets and Examples (Similar to ConQuest Examples)

Some C-Test Datasets

Datasets data.ex in TAM Package

Dataset FIMS Study with Responses of Australian and Japanese Students

Dataset from Geiser et al. (2006)

Dataset with Ordered Indicators

Dataset from Janssen and Geiser (2010)

Dataset with Raw and Scored Responses from Multiple Choice Items

Dataset Numeracy

Simulated Multifaceted Data

Simulated Rasch data

Dataset TIMSS 2011 of Australian and Taiwanese Students

Generation of Design Matrices

Parsing a String with DO Statements

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

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

Plot Function for Unidimensional Item Response Models

Deviance Plot for TAM Objects

Expected Values and Predicted Probabilities for Fitted TAM Models

Classical Test Theory Based Statistics and Plots

Bifactor Model and Exploratory Factor Analysis

Item Infit and Outfit Statistic

Joint Maximum Likelihood Estimation

Latent Regression Model

Linking of Fitted Unidimensional Item Response Models in TAM

Test Analysis Modules: Marginal Maximum Likelihood Estimation

3PL Structured Item Response Model in TAM

Model Fit Statistics in TAM

Unidimensional Non- and Semiparametric Item Response Model

Person Outfit and Infit Statistics

Plausible Value Imputation

Standard Error Estimation

Calculation of Thurstonian Thresholds

Weighted Likelihood Estimation and Maximum Likelihood Estimation of Person Parameters

Missing Data Patterns

Downcoding an Item Response Dataset

Item Response Function for the 3PL Model

Wrapper Function for TAM Language

Function for Parsing TAM Input

Conversion of Plausible Value Object into Datalist

Descriptive Statistics for Weighted Data