psychomix (version 0.2-1)

raschmix-methods: Methods for raschmix Objects

Description

Methods for raschmix-class objects.

Usage

## S3 method for class 'raschmix':
summary(object, eps = 1e-4, ...)
## S3 method for class 'raschmix':
parameters(object,
       which = c("model", "item", "score", "concomitant"),
       difficulty = TRUE, component = NULL, simplify = TRUE)
## S3 method for class 'raschmix':
worth(object, difficulty = TRUE, component = NULL)
scoreProbs(object, component = NULL, simplify = TRUE)

Arguments

object

An object of class "raschmix".

eps

Probabilities below this threshold are treated as zero in the summary method.

which

Indicates which type of parameters are used. model refers to both item and score parameters, item and score to their corresponding parameters separately. The parameters of the concomitant model are access

difficulty

Indicates whether item difficulty (default) or easiness parameters are used.

component

Indicates which components are returned. Default is all components.

simplify

Should the result be simplified if possible?

...

Currently not used.

Details

worth transforms the item parameters so that the sum over all item parameters (within each component) is zero.

scoreProbs does not include any aliased parameters if a certain raw score is not present in the data.