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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 09:07:37 -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/t13241308784mi6ir5y7ry71hf.htm/, Retrieved Sat, 25 Apr 2026 18:39:07 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=156317, Retrieved Sat, 25 Apr 2026 18:39:07 +0000

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IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

300

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

-       [Cronbach Alpha] [] [2011-12-17 14:07:37] [d76b387543b13b5e3afd8ff9e5fdc89f] [Current]

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Dataseries X:

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Histogram

Boxplots

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

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	'Gertrude Mary Cox' @ cox.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 & 'Gertrude Mary Cox' @ cox.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=156317&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]'Gertrude Mary Cox' @ cox.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=156317&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=156317&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	'Gertrude Mary Cox' @ cox.wessa.net

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.4988	0.4921	0.6187	0.139
I_felt_depressed excluded	0.3258	0.2953	0.4256	0.0773
I_felt_sad excluded	0.292	0.2502	0.4036	0.0626
everything_was_effort excluded	0.344	0.3286	0.5255	0.0892
trouble_mind excluded	0.3725	0.3683	0.5577	0.1044
I_enjoyed_life excluded	0.7494	0.7628	0.7485	0.3914
sleep_restless excluded	0.3828	0.3805	0.5725	0.1094

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.4988 & 0.4921 & 0.6187 & 0.139 \tabularnewline
I_felt_depressed excluded & 0.3258 & 0.2953 & 0.4256 & 0.0773 \tabularnewline
I_felt_sad excluded & 0.292 & 0.2502 & 0.4036 & 0.0626 \tabularnewline
everything_was_effort excluded & 0.344 & 0.3286 & 0.5255 & 0.0892 \tabularnewline
trouble_mind excluded & 0.3725 & 0.3683 & 0.5577 & 0.1044 \tabularnewline
I_enjoyed_life excluded & 0.7494 & 0.7628 & 0.7485 & 0.3914 \tabularnewline
sleep_restless excluded & 0.3828 & 0.3805 & 0.5725 & 0.1094 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=156317&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]0.4988[/C][C]0.4921[/C][C]0.6187[/C][C]0.139[/C][/ROW]
[ROW][C]I_felt_depressed excluded[/C][C]0.3258[/C][C]0.2953[/C][C]0.4256[/C][C]0.0773[/C][/ROW]
[ROW][C]I_felt_sad excluded[/C][C]0.292[/C][C]0.2502[/C][C]0.4036[/C][C]0.0626[/C][/ROW]
[ROW][C]everything_was_effort excluded[/C][C]0.344[/C][C]0.3286[/C][C]0.5255[/C][C]0.0892[/C][/ROW]
[ROW][C]trouble_mind excluded[/C][C]0.3725[/C][C]0.3683[/C][C]0.5577[/C][C]0.1044[/C][/ROW]
[ROW][C]I_enjoyed_life excluded[/C][C]0.7494[/C][C]0.7628[/C][C]0.7485[/C][C]0.3914[/C][/ROW]
[ROW][C]sleep_restless excluded[/C][C]0.3828[/C][C]0.3805[/C][C]0.5725[/C][C]0.1094[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=156317&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=156317&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	0.4988	0.4921	0.6187	0.139
I_felt_depressed excluded	0.3258	0.2953	0.4256	0.0773
I_felt_sad excluded	0.292	0.2502	0.4036	0.0626
everything_was_effort excluded	0.344	0.3286	0.5255	0.0892
trouble_mind excluded	0.3725	0.3683	0.5577	0.1044
I_enjoyed_life excluded	0.7494	0.7628	0.7485	0.3914
sleep_restless excluded	0.3828	0.3805	0.5725	0.1094

Parameters (Session):

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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Input Parameters & R Code