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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 22:41:54 +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/t1417732986t4x6shh8c6orp7h.htm/, Retrieved Wed, 11 Feb 2026 15:50:56 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=263447, Retrieved Wed, 11 Feb 2026 15:50:56 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact328

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 22:41:54] [6993448de96b8662e47595bfdf466bf3] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
4	4	3	1	4	1	1	1	1	1
3	2	1	2	2	2	2	1	2	1
3	4	2	2	2	2	2	2	2	2
5	4	3	2	5	3	2	4	3	4
1	3	1	2	2	2	1	2	1	2
2	4	2	2	3	3	3	3	3	3
4	4	2	2	2	2	2	2	4	2
4	4	2	3	4	2	2	2	2	2
2	2	2	2	3	4	2	1	2	2
2	4	4	2	3	2	2	2	2	2
2	5	2	1	1	1	1	1	1	1
4	2	2	2	2	2	1	2	2	1
2	4	2	4	4	2	2	2	2	2
3	4	2	2	4	2	2	2	3	2
2	1	1	1	1	1	2	2	2	1
4	5	2	3	5	2	4	3	2	2
4	4	4	5	5	4	3	4	5	4
4	3	2	2	2	4	1	2	2	1
4	4	2	3	3	2	1	2	3	3
3	2	3	2	2	3	1	2	3	3
2	3	2	2	4	2	3	2	2	1
4	4	2	3	4	2	2	2	3	1
4	4	3	3	4	2	2	2	4	2
3	2	2	2	3	2	3	4	1	2
4	4	3	3	3	3	3	3	3	3
4	4	3	4	4	3	3	3	3	3
3	2	2	2	4	2	2	2	2	2
2	2	4	2	2	2	2	2	2	4
2	4	2	2	3	2	1	2	2	1
4	4	3	1	1	1	1	1	1	1
4	4	2	2	4	4	2	3	4	4
5	2	3	1	2	5	4	3	1	5
4	3	2	2	2	2	2	2	2	2
5	5	5	3	5	5	2	3	2	4
4	2	2	1	1	2	4	2	2	2
2	3	1	2	2	1	2	2	2	2
4	5	2	2	4	1	2	4	2	1
4	4	1	4	2	1	3	2	2	2
4	3	2	2	3	2	2	3	2	2
2	2	2	3	1	1	4	4	1	1
3	2	2	1	3	1	1	1	1	1
4	2	2	2	2	2	2	2	2	2
5	5	5	2	4	3	2	3	2	0
4	2	2	2	2	1	1	1	1	1
3	2	3	2	2	3	3	2	3	3
4	5	2	2	3	2	2	2	2	2
2	2	2	1	2	1	2	2	1	1
4	3	1	2	2	2	2	2	2	2
4	5	5	4	4	3	3	5	4	5
4	3	3	2	2	2	3	4	2	2
2	2	2	1	1	1	1	2	1	1
2	2	4	2	3	3	4	4	2	2
3	1	1	1	1	1	1	1	3	2
4	4	3	1	2	4	1	2	3	3
2	2	4	1	1	1	1	1	1	1
2	4	2	2	2	1	2	4	1	1
4	4	2	2	4	2	2	2	4	2
2	2	2	2	2	1	1	2	2	2
2	3	3	1	1	2	2	2	2	2
4	4	2	2	2	2	1	2	2	0
3	2	2	1	2	1	2	2	1	1
5	3	1	1	2	1	2	1	1	1
4	5	4	3	3	3	4	3	2	1
3	2	2	1	2	1	1	2	1	1
4	4	2	2	3	3	3	2	2	2
3	3	1	1	1	2	1	1	2	2
2	2	2	2	3	3	3	2	2	2
2	4	1	1	1	1	3	3	2	1
5	4	5	2	2	1	2	2	4	1
1	2	1	1	1	1	1	1	1	1
4	4	2	2	2	2	3	2	2	2
4	4	2	1	3	4	2	2	2	2
4	3	2	2	2	2	2	2	2	2
3	3	2	3	2	2	3	4	2	2
5	4	2	1	1	1	1	2	1	1
4	4	2	1	2	2	2	2	3	1
2	3	2	1	4	1	2	2	1	1
4	3	2	2	3	2	2	2	2	2
4	4	2	1	3	1	1	1	4	1
2	3	1	1	1	1	1	1	1	1
2	2	1	1	1	1	1	1	1	1
1	3	1	1	2	1	1	2	1	1
3	2	1	1	2	1	3	2	1	1
5	2	2	2	2	1	2	2	2	2
4	3	4	3	3	2	2	2	2	2
3	1	3	4	2	4	3	3	3	3
4	3	2	2	2	3	2	2	3	2
2	4	2	2	2	1	1	2	2	2
4	4	2	4	4	5	2	3	4	5
4	4	1	1	2	2	1	2	4	1
5	4	1	1	3	1	2	2	1	1
4	2	2	2	2	2	2	2	2	2
4	5	2	3	3	4	3	4	2	4
4	4	2	2	2	1	2	2	2	2
4	3	2	2	2	2	2	1	3	2
2	2	1	2	3	1	1	3	2	2
4	4	2	2	3	3	2	2	4	3
2	4	2	1	2	2	2	2	2	2
2	2	2	1	2	2	2	2	2	2
1	4	3	1	2	2	2	4	2	2
4	4	3	3	3	4	3	2	2	2
5	4	3	2	2	3	3	3	3	3
4	2	2	2	2	3	2	2	2	2
3	4	2	4	2	2	4	4	2	2
2	2	1	1	2	1	1	2	2	1
2	4	4	4	3	3	2	3	4	1
2	3	3	2	2	2	3	2	2	2
4	4	2	2	4	2	3	2	2	2
1	2	1	1	1	1	2	2	1	1
4	3	1	2	2	1	2	2	2	1
2	2	1	1	1	1	2	2	1	2

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time0 seconds
R Server'Sir Maurice George Kendall' @ kendall.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 & 'Sir Maurice George Kendall' @ kendall.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263447&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]'Sir Maurice George Kendall' @ kendall.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263447&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263447&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 time0 seconds
R Server'Sir Maurice George Kendall' @ kendall.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.83910.84130.85880.3464
Perf_13 excluded0.8390.840.85470.3684
Perf_3,1 excluded0.83320.83560.84790.3609
Perf_3,2 excluded0.82620.82880.84940.3498
Perf_3,3 excluded0.81410.81510.83340.3288
Perf_3,4 excluded0.81690.82030.83850.3366
Perf_3,5 excluded0.8120.81530.82840.3291
Perf_3,6 excluded0.83330.83580.84520.3612
Perf_3,7 excluded0.82450.82550.83560.3445
Perf_3,8 excluded0.8230.82620.84280.3457
Perf_3,9 excluded0.81950.82170.83330.3387

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8391 & 0.8413 & 0.8588 & 0.3464 \tabularnewline
Perf_13 excluded & 0.839 & 0.84 & 0.8547 & 0.3684 \tabularnewline
Perf_3,1 excluded & 0.8332 & 0.8356 & 0.8479 & 0.3609 \tabularnewline
Perf_3,2 excluded & 0.8262 & 0.8288 & 0.8494 & 0.3498 \tabularnewline
Perf_3,3 excluded & 0.8141 & 0.8151 & 0.8334 & 0.3288 \tabularnewline
Perf_3,4 excluded & 0.8169 & 0.8203 & 0.8385 & 0.3366 \tabularnewline
Perf_3,5 excluded & 0.812 & 0.8153 & 0.8284 & 0.3291 \tabularnewline
Perf_3,6 excluded & 0.8333 & 0.8358 & 0.8452 & 0.3612 \tabularnewline
Perf_3,7 excluded & 0.8245 & 0.8255 & 0.8356 & 0.3445 \tabularnewline
Perf_3,8 excluded & 0.823 & 0.8262 & 0.8428 & 0.3457 \tabularnewline
Perf_3,9 excluded & 0.8195 & 0.8217 & 0.8333 & 0.3387 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263447&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]0.8391[/C][C]0.8413[/C][C]0.8588[/C][C]0.3464[/C][/ROW]
[ROW][C]Perf_13 excluded[/C][C]0.839[/C][C]0.84[/C][C]0.8547[/C][C]0.3684[/C][/ROW]
[ROW][C]Perf_3,1 excluded[/C][C]0.8332[/C][C]0.8356[/C][C]0.8479[/C][C]0.3609[/C][/ROW]
[ROW][C]Perf_3,2 excluded[/C][C]0.8262[/C][C]0.8288[/C][C]0.8494[/C][C]0.3498[/C][/ROW]
[ROW][C]Perf_3,3 excluded[/C][C]0.8141[/C][C]0.8151[/C][C]0.8334[/C][C]0.3288[/C][/ROW]
[ROW][C]Perf_3,4 excluded[/C][C]0.8169[/C][C]0.8203[/C][C]0.8385[/C][C]0.3366[/C][/ROW]
[ROW][C]Perf_3,5 excluded[/C][C]0.812[/C][C]0.8153[/C][C]0.8284[/C][C]0.3291[/C][/ROW]
[ROW][C]Perf_3,6 excluded[/C][C]0.8333[/C][C]0.8358[/C][C]0.8452[/C][C]0.3612[/C][/ROW]
[ROW][C]Perf_3,7 excluded[/C][C]0.8245[/C][C]0.8255[/C][C]0.8356[/C][C]0.3445[/C][/ROW]
[ROW][C]Perf_3,8 excluded[/C][C]0.823[/C][C]0.8262[/C][C]0.8428[/C][C]0.3457[/C][/ROW]
[ROW][C]Perf_3,9 excluded[/C][C]0.8195[/C][C]0.8217[/C][C]0.8333[/C][C]0.3387[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263447&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263447&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 itmes0.83910.84130.85880.3464
Perf_13 excluded0.8390.840.85470.3684
Perf_3,1 excluded0.83320.83560.84790.3609
Perf_3,2 excluded0.82620.82880.84940.3498
Perf_3,3 excluded0.81410.81510.83340.3288
Perf_3,4 excluded0.81690.82030.83850.3366
Perf_3,5 excluded0.8120.81530.82840.3291
Perf_3,6 excluded0.83330.83580.84520.3612
Perf_3,7 excluded0.82450.82550.83560.3445
Perf_3,8 excluded0.8230.82620.84280.3457
Perf_3,9 excluded0.81950.82170.83330.3387


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):
par1 <- 'TRUE'
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')