com.itemanalysis.psychometrics.measurement

Class ConditionalNumericItemResponseSummary

java.lang.Object

com.itemanalysis.psychometrics.measurement.ConditionalNumericItemResponseSummary

public class ConditionalNumericItemResponseSummary
extends java.lang.Object

A class for summarizing item responses conditional on a test score. The item response and test score are numeric variables. If the response is given as a String it will be parse as double.

Constructor Summary

Constructors

Constructor and Description
ConditionalNumericItemResponseSummary(VariableName variableName)

Method Summary

Modifier and Type	Method and Description
double	correlation()
double	getFrequencyAt(double score, double response)
double	getFrequencyAt(double score, int response)
double	getFrequencyAt(double score, java.lang.String response) Returns frequency of examinees with a given test score who gave a particular response.
double	getMeanAt(double score)
double	getPopulationStandardDeviationAt(double score)
double	getPopulationVarianceAt(double score)
double	getProportionAt(double score, double response)
double	getProportionAt(double score, int response)
double	getProportionAt(double score, java.lang.String response)
double	getSampleStandardDeviationAt(double score)
double	getSampleVarianceAt(double score)
void	increment(double score, double response)
void	increment(double score, double response, double freqWeight)
void	increment(double score, int response)
void	increment(double score, int response, double freqWeight)
void	increment(double score, java.lang.String response)
void	increment(double score, java.lang.String response, double freqWeight)
java.util.Iterator<java.lang.Double>	iterator()
java.util.Iterator<java.lang.Double>	iteratorAt(double score)
double	mean()
double	standardDeviation()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConditionalNumericItemResponseSummary

public ConditionalNumericItemResponseSummary(VariableName variableName)

Method Detail

increment

public void increment(double score,
                      java.lang.String response)

increment

public void increment(double score,
                      java.lang.String response,
                      double freqWeight)

increment

public void increment(double score,
                      double response)

increment

public void increment(double score,
                      double response,
                      double freqWeight)

increment

public void increment(double score,
                      int response)

increment

public void increment(double score,
                      int response,
                      double freqWeight)

getFrequencyAt

public double getFrequencyAt(double score,
                             java.lang.String response)

Returns frequency of examinees with a given test score who gave a particular response.

Parameters:

score - test score

response - item response

Returns:

frequency of item response by those with a value of score

getFrequencyAt

public double getFrequencyAt(double score,
                             double response)

getFrequencyAt

public double getFrequencyAt(double score,
                             int response)

getProportionAt

public double getProportionAt(double score,
                              java.lang.String response)

getProportionAt

public double getProportionAt(double score,
                              double response)

getProportionAt

public double getProportionAt(double score,
                              int response)

getMeanAt

public double getMeanAt(double score)

getSampleVarianceAt

public double getSampleVarianceAt(double score)

getPopulationVarianceAt

public double getPopulationVarianceAt(double score)

getSampleStandardDeviationAt

public double getSampleStandardDeviationAt(double score)

getPopulationStandardDeviationAt

public double getPopulationStandardDeviationAt(double score)

mean

public double mean()

standardDeviation

public double standardDeviation()

correlation

public double correlation()

iterator

public java.util.Iterator<java.lang.Double> iterator()

iteratorAt

public java.util.Iterator<java.lang.Double> iteratorAt(double score)