com.itemanalysis.psychometrics.irt.estimation

Class AbstractItemFitStatistic

java.lang.Object

com.itemanalysis.psychometrics.irt.estimation.AbstractItemFitStatistic

All Implemented Interfaces:

ItemFitStatistic

Direct Known Subclasses:

ItemFitG2, ItemFitSX2

public abstract class AbstractItemFitStatistic
extends java.lang.Object
implements ItemFitStatistic

Field Summary

Fields

Modifier and Type	Field and Description
protected double[][]	expectedValues
protected ItemResponseModel	irm
protected int	minExpectedCellCount
protected int	numberOfBins
protected int	numberOfCategories
protected double[]	rowMargin
protected double[]	rowThetaSum
protected double[][]	table
protected int	totalCount
protected boolean[]	validRow

Constructor Summary

Constructors

Constructor and Description
AbstractItemFitStatistic()

Method Summary

Modifier and Type	Method and Description
protected void	condenseTable()
double	getFrequencyAt(int i, int k)
double	getProportionAt(int i, int k)
int	getTotalCount()
protected void	initialize()
java.lang.String	printContingencyTable(java.lang.String title, boolean observedFrequencies)
java.lang.String	printMirtFormatTable(boolean validRowsOnly) Prints output in similar way to mirt package in R.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.itemanalysis.psychometrics.irt.estimation.ItemFitStatistic

compute, getDegreesOfFreedom, getPValue, getThetaAt, getValue

Field Detail

numberOfBins

protected int numberOfBins

numberOfCategories

protected int numberOfCategories

minExpectedCellCount

protected int minExpectedCellCount

totalCount

protected int totalCount

table

protected double[][] table

rowMargin

protected double[] rowMargin

rowThetaSum

protected double[] rowThetaSum

validRow

protected boolean[] validRow

expectedValues

protected double[][] expectedValues

irm

protected ItemResponseModel irm

Constructor Detail

AbstractItemFitStatistic

public AbstractItemFitStatistic()

Method Detail

initialize

protected void initialize()

condenseTable

protected void condenseTable()

getTotalCount

public int getTotalCount()

getFrequencyAt

public double getFrequencyAt(int i,
                             int k)

Specified by:

getFrequencyAt in interface ItemFitStatistic

getProportionAt

public double getProportionAt(int i,
                              int k)

Specified by:

getProportionAt in interface ItemFitStatistic

printContingencyTable

public java.lang.String printContingencyTable(java.lang.String title,
                                              boolean observedFrequencies)

printMirtFormatTable

public java.lang.String printMirtFormatTable(boolean validRowsOnly)

Prints output in similar way to mirt package in R. This method is mainly for viewing result during debugging. It shows the observed and expected frequencies.

Returns: