data.prep: This function prepares data into a required list format
In subscore: Computing Subscores in Classical Test Theory and Item Response Theory

data.prep

R Documentation

This function prepares data into a required list format

Description

This function generates a list of data sets using the scored original data set, which can be used as objects in subscore computing functions.

Usage

data.prep(scored.data, subtest.infor, subtest.names = NULL)

Arguments

`scored.data`	Original scored data set with rows as individuals and columns as items.
`subtest.infor`	A numerical vector. The first number indicates the number of subtests, followed by numbers of items on each subscale.
`subtest.names`	Names of the subscales AND the entire test. The default is NULL. If not provided, names of "subtest.1", "subtest.2",..., will be assigned.

Value

A list that contains item responses of all subtests and the entire test. The list is then used by other functions (e.g., CTTsub) in the package to obtain subscores.

Examples

        subtest.infor<-c(3,15,15,20) 
        subtest.names<-c("Algebra","Geometry","Measurement", "Math")
        # This math test consists of 3 subtests, which have 15 algebra 
        # items, 15 geometry items, and 20 measurement items.
        test.data<-data.prep(scored.data, subtest.infor, subtest.names)

subscore documentation built on May 24, 2022, 5:07 p.m.