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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 22:50:08 +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/t14177334265cv741xj12nut6y.htm/, Retrieved Mon, 18 May 2026 22:56:00 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=263453, Retrieved Mon, 18 May 2026 22:56:00 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact309

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 22:50:08] [6993448de96b8662e47595bfdf466bf3] [Current]
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Dataset

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

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'George Udny Yule' @ yule.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 & 'George Udny Yule' @ yule.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263453&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' @ yule.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263453&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263453&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'George Udny Yule' @ yule.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.7820.77720.77880.3037
Perf_4 excluded0.78360.77870.77420.3345
Perf_6 excluded0.75610.74920.75090.2991
Perf_12 excluded0.7460.73870.73340.2877
Perf_16 excluded0.79540.79650.78630.3587
Perf_18 excluded0.7410.73720.73010.2861
Perf_19 excluded0.73630.73130.72810.2799
Perf_24 excluded0.760.75370.75460.3042
Perf_30 excluded0.73730.73040.72520.279

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.782 & 0.7772 & 0.7788 & 0.3037 \tabularnewline
Perf_4 excluded & 0.7836 & 0.7787 & 0.7742 & 0.3345 \tabularnewline
Perf_6 excluded & 0.7561 & 0.7492 & 0.7509 & 0.2991 \tabularnewline
Perf_12 excluded & 0.746 & 0.7387 & 0.7334 & 0.2877 \tabularnewline
Perf_16 excluded & 0.7954 & 0.7965 & 0.7863 & 0.3587 \tabularnewline
Perf_18 excluded & 0.741 & 0.7372 & 0.7301 & 0.2861 \tabularnewline
Perf_19 excluded & 0.7363 & 0.7313 & 0.7281 & 0.2799 \tabularnewline
Perf_24 excluded & 0.76 & 0.7537 & 0.7546 & 0.3042 \tabularnewline
Perf_30 excluded & 0.7373 & 0.7304 & 0.7252 & 0.279 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263453&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]0.782[/C][C]0.7772[/C][C]0.7788[/C][C]0.3037[/C][/ROW]
[ROW][C]Perf_4 excluded[/C][C]0.7836[/C][C]0.7787[/C][C]0.7742[/C][C]0.3345[/C][/ROW]
[ROW][C]Perf_6 excluded[/C][C]0.7561[/C][C]0.7492[/C][C]0.7509[/C][C]0.2991[/C][/ROW]
[ROW][C]Perf_12 excluded[/C][C]0.746[/C][C]0.7387[/C][C]0.7334[/C][C]0.2877[/C][/ROW]
[ROW][C]Perf_16 excluded[/C][C]0.7954[/C][C]0.7965[/C][C]0.7863[/C][C]0.3587[/C][/ROW]
[ROW][C]Perf_18 excluded[/C][C]0.741[/C][C]0.7372[/C][C]0.7301[/C][C]0.2861[/C][/ROW]
[ROW][C]Perf_19 excluded[/C][C]0.7363[/C][C]0.7313[/C][C]0.7281[/C][C]0.2799[/C][/ROW]
[ROW][C]Perf_24 excluded[/C][C]0.76[/C][C]0.7537[/C][C]0.7546[/C][C]0.3042[/C][/ROW]
[ROW][C]Perf_30 excluded[/C][C]0.7373[/C][C]0.7304[/C][C]0.7252[/C][C]0.279[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263453&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263453&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 itmes0.7820.77720.77880.3037
Perf_4 excluded0.78360.77870.77420.3345
Perf_6 excluded0.75610.74920.75090.2991
Perf_12 excluded0.7460.73870.73340.2877
Perf_16 excluded0.79540.79650.78630.3587
Perf_18 excluded0.7410.73720.73010.2861
Perf_19 excluded0.73630.73130.72810.2799
Perf_24 excluded0.760.75370.75460.3042
Perf_30 excluded0.73730.73040.72520.279


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
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')