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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

Tue, 19 Oct 2010 17:08:23 +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/2010/Oct/19/t1287508031udosqifp4qrxw4o.htm/, Retrieved Wed, 11 Feb 2026 18:04:40 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=86776, Retrieved Wed, 11 Feb 2026 18:04:40 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

335

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 11:46:14] [b98453cac15ba1066b407e146608df68]
F    D    [Cronbach Alpha] [] [2010-10-19 17:08:23] [27f38de572a508a633f0ad2411de6a3e] [Current]

Feedback Forum

2010-10-25 21:45:50 [Naoual Ahidar] [reply] 
De cronbach Alpha moest hier berekend worden voor de 3 types extrinsieke motivaties. Zo kunnen we besluiten dat: 
Als we de correlatie bekijken, stellen we vast dat deze lager is, maar niet 0. Ik denk dat we de deze gegevens wel als een quasi-internal scale mogen gebruiken omdat de waarden (Ps-Ns)/(Ps+Ns) (= scores) en de waarden (Pc-Nc)/Pc+Nc) (= tellingen) in de tabel “Summary of survey scores” weinig van elkaar afwijken. 

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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	'George Udny Yule' @ 72.249.76.132

\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 & 'George Udny Yule' @ 72.249.76.132 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=86776&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]'George Udny Yule' @ 72.249.76.132[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=86776&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=86776&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	'George Udny Yule' @ 72.249.76.132

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.7996	0.8135	0.7814	0.5217
Q5 excluded	0.7109	0.7355	0.67	0.481
Q12 excluded	0.8178	0.8183	0.7597	0.6002
Q19 excluded	0.7049	0.7209	0.642	0.4626
Q26 excluded	0.7659	0.7809	0.719	0.5429

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7996 & 0.8135 & 0.7814 & 0.5217 \tabularnewline
Q5 excluded & 0.7109 & 0.7355 & 0.67 & 0.481 \tabularnewline
Q12 excluded & 0.8178 & 0.8183 & 0.7597 & 0.6002 \tabularnewline
Q19 excluded & 0.7049 & 0.7209 & 0.642 & 0.4626 \tabularnewline
Q26 excluded & 0.7659 & 0.7809 & 0.719 & 0.5429 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=86776&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]0.7996[/C][C]0.8135[/C][C]0.7814[/C][C]0.5217[/C][/ROW]
[ROW][C]Q5 excluded[/C][C]0.7109[/C][C]0.7355[/C][C]0.67[/C][C]0.481[/C][/ROW]
[ROW][C]Q12 excluded[/C][C]0.8178[/C][C]0.8183[/C][C]0.7597[/C][C]0.6002[/C][/ROW]
[ROW][C]Q19 excluded[/C][C]0.7049[/C][C]0.7209[/C][C]0.642[/C][C]0.4626[/C][/ROW]
[ROW][C]Q26 excluded[/C][C]0.7659[/C][C]0.7809[/C][C]0.719[/C][C]0.5429[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=86776&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=86776&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	0.7996	0.8135	0.7814	0.5217
Q5 excluded	0.7109	0.7355	0.67	0.481
Q12 excluded	0.8178	0.8183	0.7597	0.6002
Q19 excluded	0.7049	0.7209	0.642	0.4626
Q26 excluded	0.7659	0.7809	0.719	0.5429

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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