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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_cronbach.wasp
Title produced by softwareCronbach Alpha
Date of computationThu, 04 Dec 2014 22:32:37 +0000
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2014/Dec/04/t1417732666fwqyue4pdys30hi.htm/, Retrieved Wed, 11 Feb 2026 14:34:36 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=263444, Retrieved Wed, 11 Feb 2026 14:34:36 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact286

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Survey Scores] [Intrinsic Motivat...] [2010-10-12 11:18:40] [b98453cac15ba1066b407e146608df68]
- RMP   [Survey Scores] [] [2014-10-09 22:08:50] [32b17a345b130fdf5cc88718ed94a974]
- RMPD      [Cronbach Alpha] [] [2014-12-04 22:32:37] [6993448de96b8662e47595bfdf466bf3] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
1	1	1	1	2
2	4	2	2	4
1	4	3	3	4
2	4	2	5	3
2	2	2	4	4
2	2	2	3	3
2	4	4	2	2
4	4	3	4	4
2	2	2	2	2
3	2	2	2	4
2	1	2	4	5
2	1	1	2	2
2	2	2	2	3
2	1	2	2	3
1	4	3	4	2
2	1	2	2	4
5	4	3	2	4
1	2	4	3	2
3	3	2	3	3
3	3	3	2	3
1	3	3	2	4
4	2	1	4	3
3	2	2	2	4
2	3	3	4	3
3	4	3	2	3
3	4	3	4	3
2	2	2	3	2
2	2	2	2	4
1	2	2	3	2
2	1	1	1	2
4	2	2	2	3
2	4	1	1	1
3	2	2	2	2
5	1	2	2	2
4	4	2	2	2
2	2	2	2	4
2	1	2	2	2
2	2	3	2	2
2	2	2	4	3
1	3	4	4	3
1	1	1	2	1
2	2	2	2	4
5	3	4	2	3
1	1	2	1	1
2	2	2	2	4
3	2	3	2	3
1	2	2	2	2
1	1	2	2	4
3	5	5	5	2
2	2	2	4	5
2	1	2	2	2
2	2	3	3	3
1	1	1	2	2
1	3	2	2	4
2	2	2	1	2
2	4	4	4	4
3	1	2	2	2
1	1	2	5	4
1	2	2	2	2
4	2	2	3	4
2	2	4	2	2
3	3	2	3	5
3	3	3	4	4
1	1	1	2	2
4	2	3	4	3
1	1	1	3	2
2	2	3	3	4
1	4	3	5	3
1	2	2	2	2
1	1	1	2	1
2	4	3	4	2
4	2	3	1	2
2	2	2	3	2
2	3	2	4	4
2	1	1	4	4
3	2	2	2	3
3	4	2	4	4
2	3	3	3	2
2	2	2	2	2
1	1	1	3	4
1	1	1	1	2
2	3	2	3	3
1	2	1	2	2
1	3	4	2	2
3	1	1	1	2
3	4	4	4	3
1	2	2	2	3
2	2	1	1	2
2	3	2	4	4
3	2	2	2	3
1	3	3	4	4
2	2	2	2	2
2	2	2	5	4
3	2	2	2	2
2	2	1	2	3
1	2	2	2	2
1	2	2	2	2
1	1	1	2	4
1	2	2	4	2
1	1	2	4	2
3	3	3	3	5
4	3	3	2	2
2	2	2	2	2
2	2	2	2	3
2	2	2	2	4
3	3	4	2	2
3	3	3	3	5
2	3	3	2	3
1	1	1	3	4
2	3	3	3	2
1	4	4	5	2

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 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=263444&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=263444&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263444&T=0

As an alternative you can also use a QR Code:  
QR Code


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

Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R Server'Gwilym Jenkins' @ jenkins.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.62750.63230.65580.2559
Perf_2,1 excluded0.65410.65620.65350.323
Perf_2,2 excluded0.47660.47990.4760.1874
Perf_2,3 excluded0.52150.52060.51210.2136
Perf_2,4 excluded0.56930.57510.57210.2528
Perf_2,5 excluded0.62370.63470.63090.3028

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.6275 & 0.6323 & 0.6558 & 0.2559 \tabularnewline
Perf_2,1 excluded & 0.6541 & 0.6562 & 0.6535 & 0.323 \tabularnewline
Perf_2,2 excluded & 0.4766 & 0.4799 & 0.476 & 0.1874 \tabularnewline
Perf_2,3 excluded & 0.5215 & 0.5206 & 0.5121 & 0.2136 \tabularnewline
Perf_2,4 excluded & 0.5693 & 0.5751 & 0.5721 & 0.2528 \tabularnewline
Perf_2,5 excluded & 0.6237 & 0.6347 & 0.6309 & 0.3028 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263444&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]0.6275[/C][C]0.6323[/C][C]0.6558[/C][C]0.2559[/C][/ROW]
[ROW][C]Perf_2,1 excluded[/C][C]0.6541[/C][C]0.6562[/C][C]0.6535[/C][C]0.323[/C][/ROW]
[ROW][C]Perf_2,2 excluded[/C][C]0.4766[/C][C]0.4799[/C][C]0.476[/C][C]0.1874[/C][/ROW]
[ROW][C]Perf_2,3 excluded[/C][C]0.5215[/C][C]0.5206[/C][C]0.5121[/C][C]0.2136[/C][/ROW]
[ROW][C]Perf_2,4 excluded[/C][C]0.5693[/C][C]0.5751[/C][C]0.5721[/C][C]0.2528[/C][/ROW]
[ROW][C]Perf_2,5 excluded[/C][C]0.6237[/C][C]0.6347[/C][C]0.6309[/C][C]0.3028[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263444&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263444&T=1

As an alternative you can also use a QR Code:  
QR Code


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

Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.62750.63230.65580.2559
Perf_2,1 excluded0.65410.65620.65350.323
Perf_2,2 excluded0.47660.47990.4760.1874
Perf_2,3 excluded0.52150.52060.51210.2136
Perf_2,4 excluded0.56930.57510.57210.2528
Perf_2,5 excluded0.62370.63470.63090.3028


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = TRUE ;
Parameters (R input):
par1 = TRUE ;
R code (references can be found in the software module):
library(psych)
par1b <- T
if(par1=='FALSE') par1b <- F
z <- t(y)
(r <- alpha(z,check.keys=par1b))
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')