org.activemath.studentmodel2.assessment.simple
Class SimpleBeliefContainer

java.lang.Object
  org.activemath.studentmodel2.assessment.simple.SimpleBeliefContainer

All Implemented Interfaces:

IBeliefContainer

public class SimpleBeliefContainer
extends Object
implements IBeliefContainer

Field Summary

protected boolean	indirectEvidenceUsed
protected double	mastery

Constructor Summary

SimpleBeliefContainer()

Method Summary

double	getPignistic() Get the pignistic value (the mastery) stored in the BeliefContainer.
double	getPlausibility() Get the plausibility value of the mastery stored in the BeliefContainer.
boolean	isIndirectEvidenceUsed() Has indirect evidence been used to form the belief
void	setIndirectEvidenceUsed(boolean usedIndirectEvidence) Set whether indirect evidence been used to form the belief or not
void	setPignistic(double pignistic) Set the pignistic value (the mastery) stored in the BeliefContainer.
void	setPlausibility(double plausibility) Set the plausibility value for the mastery stored in the BeliefContainer.

Methods inherited from class java.lang.Object

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

Field Detail

indirectEvidenceUsed

protected boolean indirectEvidenceUsed

mastery

protected double mastery

Constructor Detail

SimpleBeliefContainer

public SimpleBeliefContainer()

Method Detail

getPignistic

public double getPignistic()

Description copied from interface: IBeliefContainer

Get the pignistic value (the mastery) stored in the BeliefContainer. The pignistic value is always a normalized mastery in [0,1].

Specified by:

getPignistic in interface IBeliefContainer

Returns:

the pignistic value, the mastery in [0,1]

getPlausibility

public double getPlausibility()

Description copied from interface: IBeliefContainer

Get the plausibility value of the mastery stored in the BeliefContainer. It can be interpreted as a measure of how strong we believe in the computed pignistic value. A value of 0 means no trust at all and a value of 1 means we are absolutely sure about the estimated pignistic value.

Specified by:

getPlausibility in interface IBeliefContainer

Returns:

the plausibility in [0,1] for the estimated mastery

isIndirectEvidenceUsed

public boolean isIndirectEvidenceUsed()

Description copied from interface: IBeliefContainer

Has indirect evidence been used to form the belief

Specified by:

isIndirectEvidenceUsed in interface IBeliefContainer

Returns:

true if indirect evidence has been taken into account, else false

setIndirectEvidenceUsed

public void setIndirectEvidenceUsed(boolean usedIndirectEvidence)

Description copied from interface: IBeliefContainer

Set whether indirect evidence been used to form the belief or not

Specified by:

setIndirectEvidenceUsed in interface IBeliefContainer

Parameters:

usedIndirectEvidence - - set true if indirect evidence has been taken into account for computing the mastery, else set to false

setPignistic

public void setPignistic(double pignistic)

Description copied from interface: IBeliefContainer

Set the pignistic value (the mastery) stored in the BeliefContainer.

Specified by:

setPignistic in interface IBeliefContainer

Parameters:

pignistic - - the pignistic value, the mastery, a value in [0,1], -1 for unknown

setPlausibility

public void setPlausibility(double plausibility)

Description copied from interface: IBeliefContainer

Set the plausibility value for the mastery stored in the BeliefContainer.

Specified by:

setPlausibility in interface IBeliefContainer

Parameters:

plausibility - - the plausibility value for the mastery, a value in [0,1]