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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

Fri, 09 Dec 2011 08:49:58 -0500

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/2011/Dec/09/t1323438623w68797pggzx03ag.htm/, Retrieved Sun, 07 Jun 2026 05:23:09 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=153361, Retrieved Sun, 07 Jun 2026 05:23:09 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

406

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]
- R PD  [Cronbach Alpha] [Cronbach alpha - ...] [2011-12-09 13:40:15] [586787d3e7267c593af3e1f6b16aa21a]
- R  D      [Cronbach Alpha] [Cronbach Alpha - ...] [2011-12-09 13:49:58] [a0aae37dd27f4b65e222573f53b5a13b] [Current]
-    D        [Cronbach Alpha] [Cronbach - Depres...] [2011-12-09 14:04:06] [586787d3e7267c593af3e1f6b16aa21a] 

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Dataseries X:

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Histogram

Boxplots

4	5	3	4	3	3	3
4	4	4	4	4	3	4
5	5	4	5	5	5	5
4	2	4	2	4	2	3
4	4	4	5	3	4	3
4	3	3	3	3	4	3
5	5	5	3	4	4	5
4	5	4	5	4	4	3
4	4	3	3	3	5	4
4	3	3	3	4	NA	4
3	2	4	4	4	4	5
4	4	4	4	4	4	4
4	4	4	4	4	4	4
4	4	4	3	4	4	4
5	5	4	5	4	5	4
4	5	4	4	4	3	3
2	4	4	4	4	2	5
5	4	5	4	5	4	5
4	4	4	4	5	3	5
4	4	4	4	4	4	4
4	4	4	4	4	3	4
4	4	4	4	4	4	4
5	5	5	4	5	4	4
4	3	4	4	4	4	4
4	5	4	NA	4	4	5
4	4	4	4	4	5	5
4	4	4	3	4	3	4
4	5	4	5	4	4	3
4	4	4	4	4	4	4
3	3	4	4	3	3	4
4	4	4	4	3	4	4
3	4	3	2	3	2	3
3	4	4	3	4	3	3
4	4	4	4	4	4	4
4	4	3	4	3	4	4
NA	2	3	2	2	3	2
1	3	2	NA	3	3	4
4	4	3	4	3	4	4
4	3	4	4	4	3	4
4	4	4	3	4	3	4
4	2	4	4	4	4	4
2	4	4	4	4	4	4
5	5	5	5	5	5	5
4	4	4	3	3	3	3
4	4	4	4	3	2	3
2	4	4	4	3	4	2
3	5	3	4	4	4	4
3	3	4	4	4	4	4
4	4	4	4	4	3	4
4	4	3	4	3	4	4
4	5	4	5	4	4	4
4	3	3	3	3	4	4
3	4	3	4	3	4	3
4	5	5	4	4	4	3
2	2	2	1	3	2	2
3	2	4	2	4	2	3
4	4	4	4	4	4	4
4	4	4	4	4	4	4
4	4	3	3	5	4	3
4	4	4	3	4	3	4
2	2	3	2	3	3	4
4	4	4	4	4	4	4
4	5	4	5	4	4	4
4	3	4	4	3	4	3
4	4	4	4	4	4	4
5	5	4	4	3	4	5
4	5	5	5	5	4	4
5	4	5	4	4	3	4
3	4	3	4	3	4	3
4	4	4	4	4	4	4
2	2	3	3	2	3	3
3	3	4	4	3	4	4
4	5	5	5	5	4	4
5	4	5	5	4	5	4
4	4	4	4	4	4	4
4	3	4	2	5	4	4
4	4	4	4	4	5	4
4	3	4	4	4	4	4
2	4	4	4	3	4	4
4	4	4	4	4	4	4
4	4	4	4	3	4	5
5	4	5	4	5	4	5
4	4	4	4	4	4	4
3	4	4	4	4	4	4
3	4	4	4	4	3	4
4	3	4	4	4	3	4
4	4	4	3	3	2	3
4	4	4	4	4	4	4
4	4	4	4	4	4	4
4	4	4	4	3	4	4
3	3	3	3	3	3	3
4	5	4	5	5	5	4
4	4	4	4	4	4	4
4	4	4	4	4	4	3
4	4	4	4	3	4	2
4	4	4	4	4	2	4
4	5	4	4	4	4	4
4	4	4	3	4	2	4
4	4	4	4	4	4	4
2	2	4	4	4	4	4
4	5	4	5	4	4	4
4	4	5	4	3	3	4
5	5	5	5	5	5	5
4	4	4	4	3	3	4
4	4	4	4	4	3	4
4	4	3	4	3	4	3
4	4	4	4	4	4	5
4	4	4	4	4	4	4
4	4	4	3	3	4	5
3	2	2	4	3	1	4
4	4	4	4	4	4	4
4	5	4	5	4	4	4
4	4	4	4	5	3	4
4	4	3	3	3	4	3
2	2	4	4	2	4	4
5	5	4	4	5	4	4
5	5	3	5	3	3	3
2	2	4	2	4	4	4
3	4	4	4	3	3	3
4	4	4	4	4	4	4
2	4	4	4	3	3	4
4	5	4	4	4	4	4
3	4	4	4	3	4	3
4	5	4	5	4	4	4
4	5	4	4	3	4	4
4	5	4	5	4	5	4
3	3	4	3	4	4	4
4	4	4	4	4	3	5
4	4	4	3	3	2	4
3	4	3	4	3	3	3
3	3	4	4	4	3	5
1	4	3	4	3	3	3
4	4	4	2	4	2	4
4	4	3	4	3	3	2
3	4	3	4	4	4	4
4	4	3	4	4	4	4
4	4	4	3	3	2	2
4	4	4	4	4	3	3
2	3	4	4	3	3	2
2	2	4	3	3	3	3
2	2	3	3	3	4	NA
4	4	4	2	4	2	4
2	2	4	4	5	3	4
3	5	5	5	5	5	4
4	3	4	4	4	4	4
2	2	3	4	3	2	2
5	5	4	4	5	4	4
4	4	3	4	3	4	3
4	4	4	4	4	4	4
2	2	4	3	3	4	4
3	3	3	2	2	2	2
4	5	4	4	4	4	3
4	4	4	2	4	3	4
4	2	4	2	4	2	4
4	2	4	3	3	3	3
2	2	3	3	3	3	2
4	5	4	5	5	5	4
4	2	3	2	2	2	4
4	4	4	3	3	2	4
4	4	4	4	4	3	4
3	2	3	2	3	4	3
2	2	4	3	4	3	3

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	1 seconds
R Server	'Gwilym Jenkins' @ jenkins.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 & 1 seconds \tabularnewline
R Server & 'Gwilym Jenkins' @ jenkins.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=153361&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]1 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Gwilym Jenkins' @ jenkins.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=153361&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=153361&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	1 seconds
R Server	'Gwilym Jenkins' @ jenkins.wessa.net

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.8114	0.8159	0.8235	0.3876
Q29_1 excluded	0.7895	0.7952	0.7916	0.3929
Q29_2 excluded	0.7723	0.7814	0.7691	0.3733
Q29_3 excluded	0.7891	0.789	0.7928	0.384
Q29_4 excluded	0.7805	0.7892	0.7781	0.3842
Q29_5 excluded	0.7805	0.7823	0.7851	0.3746
Q29_6 excluded	0.7932	0.7997	0.8017	0.3995
Q29_7 excluded	0.7994	0.8032	0.8067	0.4048

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8114 & 0.8159 & 0.8235 & 0.3876 \tabularnewline
Q29_1 excluded & 0.7895 & 0.7952 & 0.7916 & 0.3929 \tabularnewline
Q29_2 excluded & 0.7723 & 0.7814 & 0.7691 & 0.3733 \tabularnewline
Q29_3 excluded & 0.7891 & 0.789 & 0.7928 & 0.384 \tabularnewline
Q29_4 excluded & 0.7805 & 0.7892 & 0.7781 & 0.3842 \tabularnewline
Q29_5 excluded & 0.7805 & 0.7823 & 0.7851 & 0.3746 \tabularnewline
Q29_6 excluded & 0.7932 & 0.7997 & 0.8017 & 0.3995 \tabularnewline
Q29_7 excluded & 0.7994 & 0.8032 & 0.8067 & 0.4048 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=153361&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]0.8114[/C][C]0.8159[/C][C]0.8235[/C][C]0.3876[/C][/ROW]
[ROW][C]Q29_1 excluded[/C][C]0.7895[/C][C]0.7952[/C][C]0.7916[/C][C]0.3929[/C][/ROW]
[ROW][C]Q29_2 excluded[/C][C]0.7723[/C][C]0.7814[/C][C]0.7691[/C][C]0.3733[/C][/ROW]
[ROW][C]Q29_3 excluded[/C][C]0.7891[/C][C]0.789[/C][C]0.7928[/C][C]0.384[/C][/ROW]
[ROW][C]Q29_4 excluded[/C][C]0.7805[/C][C]0.7892[/C][C]0.7781[/C][C]0.3842[/C][/ROW]
[ROW][C]Q29_5 excluded[/C][C]0.7805[/C][C]0.7823[/C][C]0.7851[/C][C]0.3746[/C][/ROW]
[ROW][C]Q29_6 excluded[/C][C]0.7932[/C][C]0.7997[/C][C]0.8017[/C][C]0.3995[/C][/ROW]
[ROW][C]Q29_7 excluded[/C][C]0.7994[/C][C]0.8032[/C][C]0.8067[/C][C]0.4048[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=153361&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=153361&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	0.8114	0.8159	0.8235	0.3876
Q29_1 excluded	0.7895	0.7952	0.7916	0.3929
Q29_2 excluded	0.7723	0.7814	0.7691	0.3733
Q29_3 excluded	0.7891	0.789	0.7928	0.384
Q29_4 excluded	0.7805	0.7892	0.7781	0.3842
Q29_5 excluded	0.7805	0.7823	0.7851	0.3746
Q29_6 excluded	0.7932	0.7997	0.8017	0.3995
Q29_7 excluded	0.7994	0.8032	0.8067	0.4048

Parameters (Session):

par1 = FALSE ; par2 = 1 ; par3 = 0 ; par4 = 1 ; par5 = 12 ; par6 = 3 ; par7 = 1 ; par8 = 2 ; par9 = 1 ;

Parameters (R input):

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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Description of Statistical Computation

Tree of Dependent Computations

Dataset

Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code