make.pseudo: Transform ratings from real raters into pseudo ratings

In eatModel: Educational Assessment Tools for IRT Modeling using Conquest or TAM

Description

Data from large-scale assessments often are rated by multiple raters. This function reduces the number of raters by the use of “pseudo raters”.

Usage

make.pseudo (datLong, idCol, varCol, codCol, valueCol, n.pseudo, randomize.order = TRUE)

Arguments

datLong	Data set in the longformat, i.e. one row per examinee-variable-rater combination.
idCol	Name or column number of the person identifier (ID) variable.
varCol	Name or column number of the variable identifier.
codCol	Name or column number of the rater identifier variable.
valueCol	Name or column number of the value variable.
n.pseudo	How many pseudo rater should be used? (value must be lower than the number of real raters)
randomize.order	Logical: if TRUE, the selection of raters to pseudo raters is random.

Value

A data.frame in the long format.

Author(s)

Sebastian Weirich

Examples

data(rater)
oneRater <- make.pseudo (datLong=rater, idCol="id", varCol="variable", codCol="rater",
            valueCol="value", n.pseudo=1)
twoRaters<- make.pseudo (datLong=rater, idCol="id", varCol="variable", codCol="rater",
            valueCol="value", n.pseudo=2)

eatModel documentation built on May 2, 2019, 6:49 p.m.