irt0.2.9 package

Add or change a named value to 'misc' slot of an Item-class, `Itempo...

Calculate the area between two ICC curves

Convert a cat_output object into a data.frame.

Convert an Item-class object into a data.frame.

Convert a Response-class object into a data.frame.

Convert a Response_set-class object into a long format data.frame

Coerce a given object to Itempool-class object

This function converts Itempool objects to a list object

This function converts Response_set objects to a list object

Convert a Response_set-class object into a matrix

Calculate biserial correlation

Concatenate 'cat_design' objects

Concatenate Item, Itempool or Testlet objects and return an Item...

Calculate exposure rate of items for CAT

Calculate overlap rate of items for CAT

Prints the raw output of cat_sim

Get slots from an Item-class object.

Get slots of the an Itempool-class object.

Get slots of the an Response-class object.

Get slots of the a Response_set-class object.

Set values to parameters or components of Item-class object

Set values to parameters or components of 'Itempool' class.

Set values to components of 'Response' class objects

Set values to components of 'Response_set' class objects

Set values to parameters or components of Testlet-class object

Access slots of a Testlet-class object

Computerized Adaptive Test (CAT) Simulation

Computerized Adaptive Test (CAT) Simulation (Parallel Computing)

Calculate agreement index

Calculate classification accuracy and consistency

Convert model parameters from one model to another

Computerized Adaptive Test (CAT) Simulation Design

CUSUM based statistics for one examinee

Evaluate Differential Item Functioning (DIF) of a test

Distractor Analysis Function

Print a Testlet-class object

IRT Scale Transformation using STUIRT Program

Estimate Examinee Ability

Item Calibration via BILOG-MG

Unidimensional Item Calibration via flexMIRT

Item Calibration via IRTPRO

Estimate Rasch Model using Winsteps

Generate a random Itempool object

Generate a random Item object

Generate random item responses (Response object)

Generate a random item responses (Response_set object)

Generate a random Testlet object

Get administered items from a CAT output

Extracts the response data of CAT output.

Calculate the maximum score of a set of items

Generalized Partial Credit Model

Reparameterized Generalized Partial Credit Model

Graded Response Model

Calculates the information of an "Item" object

Item Parameter Drift

irt: Item Response Theory and Computerized Adaptive Testing Functions

One-Parameter Logistic IRT model

Two-Parameter Logistic IRT model

Three-Parameter Logistic IRT model

Three-Parameter Logistic IRT model

Check whether an object is an Item-class

An S4 class to represent an Item

Create an Item object

Item Analysis Function

Calculate item-fit indices

An S4 class to represent an Itempool

Create an Itempool object

Calculate Cohen's Kappa Coefficient

Item Characteristic Curve Estimation using Kernel Smoothing

Find the length of an Itempool-class object

Multidimensional Two-Parameter Logistic Model

Multidimensional Three-Parameter Logistic Model

Calculate the maximum possible score

Calculate the expected value of an Item

Calculate the expected value of an Itempool

Calculate the expected value of an Testlet

Partial Credit Model

Calculate person-fit indices

Plot progress of a CAT algorithm for one examinee

Plot Item Characteristic Curve of an Item object

Plot Item Characteristic Curves or Test Characteristic Curve of an `It...

Plot Item Fit using Kernel-Smoothing

Plot Empirical Item or Test characteristic curve

Plot Empirical Item characteristic curve

Plot Empirical Item Characteristic Curve

Plot Item Information Function

Plot the Log-Likelihood of a response string

Calculate point-biserial correlation

Print an Item-class object

Show an Itempool-class object

Show an Response-class object

Print a Response_set-class object

Prints bilog_output objects

Prints cat_design objects.

This method prints an "cat_output" class object

Calculate the probability of a correct response

Calculate summed-score probabilities

Calculate Quality of Item Pool Index

Rasch model

Likelihood of a response string

Log-likelihood of a Response String

An S4 class representing responses of a single examinee

Create a Response object from a vector of responses

An S4 class representing responses of a set of examinees

Create Response_set-class object

Calculate Root Mean Square Deviation (RMSD) (or Root Mean Square Error...

Convert raw score to scale score and vice versa

Calculate Score Information Function

Score Raw Responses

This method shows an "cat_output" class object

Show an Item-class object

Generate responses for a given model

Subset Itempool objects

Subset Itempool objects

Subset Response_set objects

Access the items of a Testlet-class object.

Set the elements of an Itempool objects.

Set the elements of an Response_set objects.

This function sets the elements of a Testlet objects.

Subset Testlet-class object

Subset Response_set objects

Summarizes the raw output of cat_sim

If a list object consists of all "cat_output" objects, then it will ru...

An S4 class to represent a Testlet

Creates a Testlet-class object

Calculate the variance of an Item

Calculate the variances of items in an Itempool

Calculate the variances of items in a Testlet