ScaleData: Define Data Set, Reverse Items and Alternate Orders

In Scale: Likert Type Questionnaire Item Analysis

Description

Construct a ScaleData object, in order to hold data, item content, administration order(s), reverse items and item column names.

Usage

Scale(data, orders, orders_id, reverse, items, col_names)

Arguments

data	A data.frame with participants as rows and items as columns.
orders	A list of the various orders used for reordering the questionnaire administration, if any. Each order is an integer vector.
orders_id	An integer vector identifying which order of the questionnaire each participant received.
reverse	In the original order, which of the items need to be reversed.
items	An optional character vector containing the item statements.
col_names	An optional character vector of the desired column names of the items, in the original order.

Value

A ScaleData object, with the above arguments named, in order to be passed on to the PreProc() function.

Author(s)

Nikolaos Giallousis, [e-mail]

Examples

data(Depression98)
depressionScale <- Scale(data=Depression98, 
                          orders=list(
                            c(16,19,11,9,1,17,5,18,4,8,2,12,
                              20,10,14,6,3,13,15,7),
                            c(1,18,4,15,7,8,3,14,20,6,19,16,
                            12,5,10,13,2,17,11,9)),
                            orders_id=c(
                                        rep(1, 49),
                                        rep(2, 49)),
                            reverse=c(3,4,13,14,18,20),
                            col_names= paste('q', 1:20, sep=''))
str(depressionScale)

Scale documentation built on May 2, 2019, 1:27 p.m.