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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

Sat, 17 Dec 2011 09:26:46 -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/17/t1324132025md04ghh9n8i6sg9.htm/, Retrieved Wed, 13 May 2026 08:46:59 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=156334, Retrieved Wed, 13 May 2026 08:46:59 +0000

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IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

366

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

-       [Cronbach Alpha] [] [2011-12-17 14:26:46] [d76b387543b13b5e3afd8ff9e5fdc89f] [Current]

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Dataseries X:

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Histogram

Boxplots

1	1	2	2	3	4	3
1	1	2	2	2	3	2
1	1	2	2	3	4	1
1	1	1	2	3	4	1
1	1	1	1	1	3	1
1	1	1	1	1	4	1
1	1	1	4	1	4	1
1	1	1	1	1	3	1
1	1	1	3	3	3	2
1	1	1	2	2	3	2
1	1	1	1	1	4	2
1	1	1	2	1	4	2
1	1	1	1	2	1	2
1	1	1	2	1	1	1
1	1	1	3	1	4	1
1	1	1	1	2	4	1
1	1	1	2	2	4	1
1	1	2	1	1	4	1
1	1	1	3	3	4	1
1	1	2	1	2	3	1
1	2	2	3	2	3	3
1	1	2	2	2	3	1
1	1	2	3	4	3	3
1	1	1	3	1	2	2
1	1	2	1	3	3	1
1	1	1	2	2	4	3
1	1	1	2	1	4	3
1	1	1	1	2	4	1
1	1	1	2	2	3	2
1	1	2	3	1	3	1
1	1	2	3	2	3	2
1	2	1	2	4	3	3
1	2	2	1	2	3	2
1	1	2	3	3	4	3
1	1	1	2	4	3	1
1	1	1	1	1	4	1
1	1	1	1	2	4	1
1	1	2	2	2	4	3
1	1	1	2	3	4	1
1	1	2	1	1	4	2
1	2	2	2	3	4	1
1	1	1	2	2	4	2
1	1	1	2	1	3	1
1	1	1	1	1	3	3
1	1	2	2	2	3	3
1	1	1	1	2	4	1
1	1	2	4	1	4	1
1	1	2	2	2	3	1
1	1	2	1	2	4	1
1	1	1	1	2	4	2
1	1	2	3	1	3	2
1	1	1	1	1	4	4
1	1	2	2	1	4	1
1	1	2	2	4	3	2
1	1	1	1	1	3	1
1	1	2	1	2	4	1
1	1	3	2	2	4	4
1	1	2	1	1	4	1
1	1	2	3	3	3	4
1	2	2	3	3	3	1
1	1	1	2	4	3	3
1	1	1	1	1	4	2
1	1	1	1	3	4	3
1	1	2	2	2	4	2
1	1	2	2	3	3	2
1	1	2	1	3	3	2
1	1	2	1	1	3	1
1	1	2	1	1	3	2
1	1	2	2	3	3	1
1	1	1	2	2	4	3
1	1	2	3	3	4	4
1	2	2	2	3	3	2
2	2	2	4	2	2	1
2	2	2	3	3	3	2
2	1	1	1	1	4	2
2	1	1	1	2	4	2
2	1	2	2	2	3	3
2	1	2	2	3	3	2
2	3	3	3	3	2	4
2	1	2	2	2	3	3
2	3	3	3	2	3	2
2	3	3	3	2	3	3
2	3	2	2	2	1	1
2	2	2	2	2	3	2
2	1	2	2	3	4	2
2	2	2	3	3	2	2
2	1	1	2	2	4	1
2	2	2	3	3	2	2
2	2	2	2	2	3	1
2	2	2	4	3	3	3
2	1	1	3	4	4	2
2	1	2	2	3	3	2
2	2	2	3	1	3	3
2	1	2	2	1	4	3
2	1	3	3	2	2	3
2	2	2	3	3	3	1
2	1	2	1	2	4	3
2	1	1	2	3	4	3
2	1	1	2	2	3	4
2	2	3	2	3	2	3
2	2	2	3	2	3	3
2	3	3	2	4	1	3
2	2	3	3	3	2	4
2	1	1	1	2	4	2
2	1	2	3	3	3	3
2	3	4	3	3	2	1
2	2	2	2	2	4	1
2	2	2	2	2	4	2
2	3	3	3	3	2	3
2	2	2	2	2	3	2
2	1	1	2	2	4	1
2	3	3	1	1	3	1
2	1	2	2	1	4	2
2	1	2	2	3	3	1
2	1	2	2	1	3	3
2	1	1	2	1	4	3
2	2	2	2	3	3	2
2	2	2	2	3	4	2
2	1	1	1	3	4	1
3	4	4	2	4	2	4
3	3	3	4	4	2	3
3	1	2	3	4	3	4
3	3	3	4	2	2	1
3	3	3	2	3	1	4
3	2	2	2	2	3	3
3	1	2	2	2	3	4
3	3	3	2	3	2	3
3	1	1	2	1	3	1
3	2	3	4	4	3	2
3	1	2	3	1	3	3
3	2	3	3	3	2	4
3	2	2	3	4	3	1
3	4	3	3	4	1	4
3	1	2	3	3	2	2
3	2	3	2	3	3	1
3	1	3	2	4	3	2
3	3	2	2	1	4	3
3	2	3	2	1	3	2
4	4	4	4	3	2	4
4	4	4	4	3	3	4
4	3	3	2	2	2	3
4	2	2	3	3	2	3
4	4	4	4	4	3	4

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=156334&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=156334&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=156334&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	0.6242	0.6189	0.7153	0.1883
shake_off_blues excluded	0.4967	0.4804	0.617	0.1335
I_felt_depressed excluded	0.5019	0.4822	0.5902	0.1343
I_felt_sad excluded	0.494	0.4698	0.5939	0.1287
everything_was_effort excluded	0.5358	0.5272	0.6646	0.1567
trouble_mind excluded	0.5646	0.5592	0.6889	0.1746
I_enjoyed_life excluded	0.8023	0.8133	0.8057	0.4207
sleep_restless excluded	0.555	0.5506	0.685	0.1696

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.6242 & 0.6189 & 0.7153 & 0.1883 \tabularnewline
shake_off_blues excluded & 0.4967 & 0.4804 & 0.617 & 0.1335 \tabularnewline
I_felt_depressed excluded & 0.5019 & 0.4822 & 0.5902 & 0.1343 \tabularnewline
I_felt_sad excluded & 0.494 & 0.4698 & 0.5939 & 0.1287 \tabularnewline
everything_was_effort excluded & 0.5358 & 0.5272 & 0.6646 & 0.1567 \tabularnewline
trouble_mind excluded & 0.5646 & 0.5592 & 0.6889 & 0.1746 \tabularnewline
I_enjoyed_life excluded & 0.8023 & 0.8133 & 0.8057 & 0.4207 \tabularnewline
sleep_restless excluded & 0.555 & 0.5506 & 0.685 & 0.1696 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=156334&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]0.6242[/C][C]0.6189[/C][C]0.7153[/C][C]0.1883[/C][/ROW]
[ROW][C]shake_off_blues excluded[/C][C]0.4967[/C][C]0.4804[/C][C]0.617[/C][C]0.1335[/C][/ROW]
[ROW][C]I_felt_depressed excluded[/C][C]0.5019[/C][C]0.4822[/C][C]0.5902[/C][C]0.1343[/C][/ROW]
[ROW][C]I_felt_sad excluded[/C][C]0.494[/C][C]0.4698[/C][C]0.5939[/C][C]0.1287[/C][/ROW]
[ROW][C]everything_was_effort excluded[/C][C]0.5358[/C][C]0.5272[/C][C]0.6646[/C][C]0.1567[/C][/ROW]
[ROW][C]trouble_mind excluded[/C][C]0.5646[/C][C]0.5592[/C][C]0.6889[/C][C]0.1746[/C][/ROW]
[ROW][C]I_enjoyed_life excluded[/C][C]0.8023[/C][C]0.8133[/C][C]0.8057[/C][C]0.4207[/C][/ROW]
[ROW][C]sleep_restless excluded[/C][C]0.555[/C][C]0.5506[/C][C]0.685[/C][C]0.1696[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=156334&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=156334&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	0.6242	0.6189	0.7153	0.1883
shake_off_blues excluded	0.4967	0.4804	0.617	0.1335
I_felt_depressed excluded	0.5019	0.4822	0.5902	0.1343
I_felt_sad excluded	0.494	0.4698	0.5939	0.1287
everything_was_effort excluded	0.5358	0.5272	0.6646	0.1567
trouble_mind excluded	0.5646	0.5592	0.6889	0.1746
I_enjoyed_life excluded	0.8023	0.8133	0.8057	0.4207
sleep_restless excluded	0.555	0.5506	0.685	0.1696

Parameters (Session):

par1 = pearson ;

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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Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code