reliability function

Compute Reliability and Standard Error

This function computes the reliability index, separation and the standard error of the models estimation.

checkRel(obj)

## S3 method for class 'seprel'
summary(object, ...)

Arguments

• obj: Object that resulted from any models estimation, e.g., pcm, gpcm, pcmdif, and gpcmdif.
• object: The object of class 'seprel'.
• ...: Further arguments to be passed.

Returns

A list of two objects, the reliability and the standard error.

reliability

• PRIPerson reliability index.
• PSRPerson separation reliability.
• IRIItem reliability index.
• ISRItem separation reliability.

stdError

• var_err_persA matrix of variance error of the estimation.
• std_err_persA matrix of standard error of the estimation.
• rmsse_persRoot mean square of the standard error per person.
• var_err_itemA matrix of variance error of the estimation.
• std_err_itemA matrix of standard error of the estimation.
• rmsse_itemRoot mean square of the standard error per person.
• hessian_thetaHessian matrix of theta parameter.
• hessian_betaHessian matrix of beta parameter.

Details

Person reliability index

Examples

pcmObject <- pcm(shortDIF)
rel <- checkRel(pcmObject)
summary(rel)