Print Out Summary of Reliability Analysis

Description

Selectively print Reliability data from an ItemAnalysis object, created by the ItemAnalysis() function.

Usage

## S3 method for class 'reliability'
print(x, ...)

Arguments

Author(s)

Nikolaos Giallousis, psierevn@gmail.com

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=''))

depressionPre <- PreProc(depressionScale)

depressionRel <- ItemAnalysis(depressionPre)

# specifies that you want to print only the 
# reliability part of the object.
print(depressionRel$rely) 

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(Scale)
Loading required package: psych
Loading required package: Hmisc
Loading required package: lattice
Loading required package: survival
Loading required package: Formula
Loading required package: ggplot2

Attaching package: 'ggplot2'

The following objects are masked from 'package:psych':

    %+%, alpha


Attaching package: 'Hmisc'

The following object is masked from 'package:psych':

    describe

The following objects are masked from 'package:base':

    format.pval, round.POSIXt, trunc.POSIXt, units

Loading required package: MASS
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/Scale/print.reliability.Rd_%03d_medium.png", width=480, height=480)
> ### Name: print.reliability
> ### Title: Print Out Summary of Reliability Analysis
> ### Aliases: print.reliability
> ### Keywords: survey multivariate
> 
> ### ** 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=''))
> 
> depressionPre <- PreProc(depressionScale)
Warning message:
In PreProc(depressionScale) :
  Items' vector unspecified. out$items is NULL...
> 
> depressionRel <- ItemAnalysis(depressionPre)
> 
> # specifies that you want to print only the 
> # reliability part of the object.
> print(depressionRel$rely) 

Reliability Analysis of depressionPre ScaleData object. 

A spearman correlation matrix of 20 items was calculated and submitted to Reliability analysis.
      
The overall Cronbach's Alpha was 0.83 .
Item(s) that exhibited low correlation with the rest of the scale were:
 1 and 3 .
Furthermore, deleting item(s) 1 and 3 may improve reliability.> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>