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Author's title

Author

*The author of this computation has been verified*

R Software Module

rwasp_cronbach.wasp

Title produced by software

Cronbach Alpha

Date of computation

Sun, 14 Dec 2014 13:23:33 +0000

Cite this page as follows

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2014/Dec/14/t1418563565xu8fbubo4m6bki0.htm/, Retrieved Sat, 14 Feb 2026 02:54:27 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=267558, Retrieved Sat, 14 Feb 2026 02:54:27 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

347

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)

-     [Cronbach Alpha] [Intrinsic Motivat...] [2010-10-12 11:40:37] [b98453cac15ba1066b407e146608df68]
- RMPD  [Cronbach Alpha] [E1] [2014-10-14 09:38:52] [36c866d94170840abc594fd3e7d5794f]
-    D    [Cronbach Alpha] [exclude] [2014-12-14 13:19:06] [2568c9326b0361ae14a2b722dbd6de4e]
-    D        [Cronbach Alpha] [exclude] [2014-12-14 13:23:33] [4475d2f35de7f19e7f9792645feacf86] [Current]

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Dataseries X:

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Boxplots

-1 0 1 -1 1 1 1
-1 1 -1 0 0 1 1
-1 0 -1 -1 1 1 0
1 -1 1 -1 1 1 1
-1 1 1 -1 1 0 0
-1 0 -1 0 1 0 1
0 0 0 0 0 0 0
-1 1 -1 -1 1 0 1
-1 1 -1 1 1 1 -1
0 1 1 1 -1 1 -1
-1 -1 0 1 1 1 -1
-1 1 -1 1 1 1 1
0 1 1 -1 1 1 -1
-1 0 -1 1 0 -1 1
-1 1 -1 -1 1 1 -1
-1 -1 -1 1 0 -1 0
-1 1 -1 1 1 1 1
-1 -1 -1 1 1 1 1
-1 -1 1 -1 -1 -1 1
-1 1 -1 1 1 1 1
-1 1 1 0 1 -1 1
-1 -1 -1 1 1 1 1
-1 1 -1 -1 -1 0 1
-1 1 1 -1 1 1 1
-1 1 -1 1 0 -1 0
0 1 1 0 1 0 1
-1 1 0 1 1 0 -1
-1 -1 1 1 1 1 1
-1 -1 1 -1 1 -1 -1
-1 -1 1 1 0 1 1
-1 1 1 0 -1 1 1
-1 1 -1 1 1 -1 0
-1 1 -1 -1 -1 0 1
-1 1 -1 1 0 0 0
-1 -1 -1 1 1 0 1
-1 -1 -1 -1 0 1 1
-1 1 1 0 0 1 1
-1 -1 -1 1 1 1 1
-1 -1 -1 1 0 0 1
0 0 0 0 0 0 0
-1 1 -1 0 1 1 1
-1 -1 -1 1 1 1 1
-1 1 -1 1 1 1 1
-1 0 0 0 0 0 0
-1 1 0 0 0 1 1
1 -1 -1 1 1 1 1
-1 -1 1 1 1 1 1
-1 -1 1 0 1 0 -1
-1 1 -1 0 1 0 1
0 -1 1 -1 -1 0 1
-1 -1 -1 1 0 0 1
-1 1 1 1 1 1 1
-1 -1 0 -1 0 1 1
-1 1 -1 -1 0 0 1
-1 1 0 1 0 -1 1
0 0 0 0 0 0 0
0 0 -1 1 1 -1 1
-1 1 0 1 -1 1 1
-1 1 1 -1 -1 0 -1
-1 0 1 -1 0 0 1
-1 -1 0 -1 -1 -1 1
0 1 -1 1 0 1 -1
-1 -1 -1 1 1 1 1

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	0 seconds
R Server	'Sir Maurice George Kendall' @ kendall.wessa.net

\begin{tabular}{lllllllll}
\hline
Summary of computational transaction \tabularnewline
Raw Input & view raw input (R code)  \tabularnewline
Raw Output & view raw output of R engine  \tabularnewline
Computing time & 0 seconds \tabularnewline
R Server & 'Sir Maurice George Kendall' @ kendall.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=267558&T=0

[TABLE]
[ROW][C]Summary of computational transaction[/C][/ROW]
[ROW][C]Raw Input[/C][C]view raw input (R code) [/C][/ROW]
[ROW][C]Raw Output[/C][C]view raw output of R engine [/C][/ROW]
[ROW][C]Computing time[/C][C]0 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Sir Maurice George Kendall' @ kendall.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=267558&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=267558&T=0

As an alternative you can also use a QR Code:

The GUIDs for individual cells are displayed in the table below:

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	0 seconds
R Server	'Sir Maurice George Kendall' @ kendall.wessa.net

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.3927	0.3813	0.3982	0.0809
DECTEST1 excluded	0.4007	0.4038	0.4065	0.1014
DECTEST2 excluded	0.4336	0.4138	0.4115	0.1052
DECTEST3 excluded	0.3035	0.2868	0.2914	0.0628
DECTEST4 excluded	0.2628	0.2651	0.2769	0.0567
DECTEST5 excluded	0.3164	0.304	0.3173	0.0679
DECTEST6 excluded	0.3867	0.3763	0.3794	0.0914
DECTEST7 excluded	0.3614	0.3457	0.3573	0.0809

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.3927 & 0.3813 & 0.3982 & 0.0809 \tabularnewline
DECTEST1 excluded & 0.4007 & 0.4038 & 0.4065 & 0.1014 \tabularnewline
DECTEST2 excluded & 0.4336 & 0.4138 & 0.4115 & 0.1052 \tabularnewline
DECTEST3 excluded & 0.3035 & 0.2868 & 0.2914 & 0.0628 \tabularnewline
DECTEST4 excluded & 0.2628 & 0.2651 & 0.2769 & 0.0567 \tabularnewline
DECTEST5 excluded & 0.3164 & 0.304 & 0.3173 & 0.0679 \tabularnewline
DECTEST6 excluded & 0.3867 & 0.3763 & 0.3794 & 0.0914 \tabularnewline
DECTEST7 excluded & 0.3614 & 0.3457 & 0.3573 & 0.0809 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=267558&T=1

[TABLE]
[ROW][C]Cronbach Alpha and Related Statistics[/C][/ROW]
[ROW][C]Items[/C][C]Cronbach Alpha[/C][C]Std. Alpha[/C][C]G6(smc)[/C][C]Average R[/C][/ROW]
[ROW][C]All itmes[/C][C]0.3927[/C][C]0.3813[/C][C]0.3982[/C][C]0.0809[/C][/ROW]
[ROW][C]DECTEST1 excluded[/C][C]0.4007[/C][C]0.4038[/C][C]0.4065[/C][C]0.1014[/C][/ROW]
[ROW][C]DECTEST2 excluded[/C][C]0.4336[/C][C]0.4138[/C][C]0.4115[/C][C]0.1052[/C][/ROW]
[ROW][C]DECTEST3 excluded[/C][C]0.3035[/C][C]0.2868[/C][C]0.2914[/C][C]0.0628[/C][/ROW]
[ROW][C]DECTEST4 excluded[/C][C]0.2628[/C][C]0.2651[/C][C]0.2769[/C][C]0.0567[/C][/ROW]
[ROW][C]DECTEST5 excluded[/C][C]0.3164[/C][C]0.304[/C][C]0.3173[/C][C]0.0679[/C][/ROW]
[ROW][C]DECTEST6 excluded[/C][C]0.3867[/C][C]0.3763[/C][C]0.3794[/C][C]0.0914[/C][/ROW]
[ROW][C]DECTEST7 excluded[/C][C]0.3614[/C][C]0.3457[/C][C]0.3573[/C][C]0.0809[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=267558&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=267558&T=1

As an alternative you can also use a QR Code:

The GUIDs for individual cells are displayed in the table below:

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.3927	0.3813	0.3982	0.0809
DECTEST1 excluded	0.4007	0.4038	0.4065	0.1014
DECTEST2 excluded	0.4336	0.4138	0.4115	0.1052
DECTEST3 excluded	0.3035	0.2868	0.2914	0.0628
DECTEST4 excluded	0.2628	0.2651	0.2769	0.0567
DECTEST5 excluded	0.3164	0.304	0.3173	0.0679
DECTEST6 excluded	0.3867	0.3763	0.3794	0.0914
DECTEST7 excluded	0.3614	0.3457	0.3573	0.0809

Parameters (Session):

par1 = TRUE ;

Parameters (R input):

par1 = TRUE ;

R code (references can be found in the software module):

library(psych)
z <- t(y)
(r <- alpha(z))
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Cronbach Alpha and Related Statistics',5,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Items',1,TRUE)
a<-table.element(a,'Cronbach Alpha',1,TRUE)
a<-table.element(a,'Std. Alpha',1,TRUE)
a<-table.element(a,'G6(smc)',1,TRUE)
a<-table.element(a,'Average R',1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'All itmes',header=TRUE)
a<-table.element(a,round(r$total['raw_alpha'],4))
a<-table.element(a,round(r$total['std.alpha'],4))
a<-table.element(a,round(r$total['G6(smc)'],4))
a<-table.element(a,round(r$total['average_r'],4))
a<-table.row.end(a)
n = length(z[1,])
for (i in 1:n) {
a<-table.row.start(a)
a<-table.element(a,paste(colnames(z)[i],' excluded',sep=''),header=TRUE)
a<-table.element(a,round(r$alpha.drop[i,'raw_alpha'],4))
a<-table.element(a,round(r$alpha.drop[i,'std.alpha'],4))
a<-table.element(a,round(r$alpha.drop[i,'G6(smc)'],4))
a<-table.element(a,round(r$alpha.drop[i,'average_r'],4))
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable.tab')

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Input Parameters & R Code