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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 computationFri, 10 Dec 2010 15:41:27 +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/2010/Dec/10/t1291995673rpdb5b5jrnqjssv.htm/, Retrieved Wed, 11 Feb 2026 15:11:21 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=107776, Retrieved Wed, 11 Feb 2026 15:11:21 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact346

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]
-   PD  [Survey Scores] [Task 3.1 deel 1] [2010-10-15 11:32:13] [9f32078fdcdc094ca748857d5ebdb3de]
- RMPD      [Cronbach Alpha] [chronbach alpha] [2010-12-10 15:41:27] [7b4029fa8534fd52dfa7d68267386cff] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
3	4	4	4	3	2	4
4	4	4	3	2	4	4
4	5	5	4	4	4	4
2	2	3	4	2	3	3
2	2	4	4	4	4	2
3	4	3	4	2	2	4
2	4	4	4	3	4	4
3	4	3	4	4	2	3
3	4	2	2	1	3	2
3	2	4	4	2	3	3
3	3	2	3	2	3	3
4	4	2	2	2	3	2
2	3	2	2	2	2	2
2	4	1	3	1	3	2
1	4	4	4	2	4	4
1	4	4	5	4	5	4
3	4	2	4	2	4	3
2	2	2	2	2	2	2
2	4	3	4	3	3	3
3	4	3	3	2	4	4
4	4	3	4	3	2	3
4	3	4	2	2	3	3
3	2	3	2	3	2	4
2	4	2	4	2	2	2
3	2	2	4	3	2	4
4	3	4	4	3	3	2
3	4	4	4	4	3	3
2	3	3	3	2	3	3
1	4	4	4	4	3	4
3	4	2	5	3	3	2
2	4	4	4	4	3	4
4	4	4	4	3	3	4
4	4	5	4	4	4	4
5	4	5	4	4	5	5
2	4	4	4	3	4	4
4	5	4	4	5	4	3
4	4	4	4	4	4	4
2	2	2	4	2	3	2
4	4	4	4	4	4	4
4	4	4	5	4	4	4
2	5	4	4	5	2	4
3	4	3	4	4	4	3
2	2	2	2	2	2	2
4	4	3	4	4	3	3
3	4	4	4	4	3	4
1	4	3	4	1	4	3
2	2	2	4	2	2	4
5	5	4	4	5	4	5
2	4	4	4	4	3	4
4	4	3	4	2	4	4
4	4	4	3	3	2	3
2	4	3	4	4	2	2
2	4	4	4	2	2	2
2	3	2	4	1	1	2
4	5	4	3	4	5	5
3	4	4	3	2	4	4
4	4	4	4	4	2	4
2	4	4	4	2	4	4
3	4	3	5	3	2	2
2	2	1	3	2	2	2
2	4	3	4	3	4	4
3	4	3	4	2	4	4
2	4	4	4	2	4	4
3	4	2	4	3	4	4
2	3	3	4	1	3	3
4	4	5	4	5	4	5
2	2	4	4	4	3	3
5	4	4	4	4	4	2
1	4	3	4	1	3	3
3	4	4	4	2	4	4
2	4	2	4	2	4	2
2	4	3	4	2	3	3
3	4	4	4	4	4	4
4	3	3	3	2	4	4
4	4	4	4	3	3	3
2	4	4	4	2	2	2
3	4	3	3	2	3	3
4	4	3	4	2	3	2
2	4	2	4	4	3	4
2	4	4	4	3	4	4
4	4	3	4	3	3	4
2	2	2	4	2	3	2
4	3	2	2	2	4	2
2	5	3	4	3	4	4
3	3	2	3	2	3	3
4	3	2	3	2	3	3
3	4	4	4	3	4	4
1	4	4	4	4	3	3
3	4	4	4	4	4	4
2	4	2	3	2	2	2
2	4	2	2	2	3	2
1	3	4	5	2	2	2
3	4	2	2	2	2	2
2	4	3	4	3	3	3
3	4	3	4	2	2	3
5	5	5	4	5	4	4
3	4	3	3	2	3	3
	4	4	4	4	2	3
2	2	3	3	3	3	2
2	3	2	4	3	2	2
3	3	4	4	3	3	3
2	3	3	3	2	3	3
2	4	3	2	3	3	3
2	4	3	4	2	3	3
3	2	4	3	2	2	4
5	3	1	2	1	3	2
2	3	3	3	2	3	2
3	4	2	4	2	2	2
3	4	3	4	3	2	3
1	2	2	4	2	2	2
1	3	2	2	2	2	2
3	4	2	2	2	2	3
4	4	4	3	2	3	4
5	5	5	5	5	5	5
3	3	5	4	4	5	5
3	3	3	4	3	2	3
3	4	4	4	4	2	4
2	3	4	4	2	2	3
3	3	3	4	2	4	3
2	2	2	3	1	2	1
3	4	4	4	4	4	3
2	3	2	4	2	2	2
4	4	3	3	4	4	3
2	5	2	4	1	4	2
2	4	2	3	2	4	2
4	3	2	4	3	3	2
4	3	4	4	2	2	3
3	3	4	4	3	3	4
3	3	4	4	2	2	3
3	4	4	4	4	3	4
4	4	3	4	3	3	3
2	3	2	4	2	1	2
1	2	4	5	4	3	4
3	3	3	2	3	1	3
2	2	2	4	2	2	2
3	4	4	4	4	3	4
2	4	3	3	1	4	2
2	4	3	3	2	4	3
3	4	3	4	1	3	3
2	4	3	4	2	4	3
4	4	3	3	3	4	2
4	5	4	4	4	4	4
2	3	5	1	4	3	3
2	4	2	3	4	2	4
3	4	2	4	3	3	4
4	4	4	4	4	4	3
4	5	3	4	4	3	2
4	3	3	4	3	2	2
1	2	1	3	1	1	1
4	4	2	4	2	2	2
4	3	4	4	4	4	3
3	4	4	4	3	2	4
1	5	5	4	5	4	5
2	3	2	4	3	3	2
2	3	4	3	4	5	3
2	3	3	4	2	2	3
3	5	2	4	4	3	3
3	4	4	3	3	3	2
3	2	2	3	3	2	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'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=107776&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=107776&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107776&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' @ 72.249.76.132






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.72640.72980.74080.2784
Q1_4 excluded0.74270.7440.73270.3264
Q1_6 excluded0.67440.67780.67660.2596
Q1_12 excluded0.68790.69280.70370.2732
Q1_16 excluded0.70460.70730.70090.2871
Q1_19 excluded0.66390.67140.67630.254
Q1_24 excluded0.66490.66670.67080.25
Q1_30 excluded0.71520.71890.72740.2989

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7264 & 0.7298 & 0.7408 & 0.2784 \tabularnewline
Q1_4 excluded & 0.7427 & 0.744 & 0.7327 & 0.3264 \tabularnewline
Q1_6 excluded & 0.6744 & 0.6778 & 0.6766 & 0.2596 \tabularnewline
Q1_12 excluded & 0.6879 & 0.6928 & 0.7037 & 0.2732 \tabularnewline
Q1_16 excluded & 0.7046 & 0.7073 & 0.7009 & 0.2871 \tabularnewline
Q1_19 excluded & 0.6639 & 0.6714 & 0.6763 & 0.254 \tabularnewline
Q1_24 excluded & 0.6649 & 0.6667 & 0.6708 & 0.25 \tabularnewline
Q1_30 excluded & 0.7152 & 0.7189 & 0.7274 & 0.2989 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=107776&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]0.7264[/C][C]0.7298[/C][C]0.7408[/C][C]0.2784[/C][/ROW]
[ROW][C]Q1_4 excluded[/C][C]0.7427[/C][C]0.744[/C][C]0.7327[/C][C]0.3264[/C][/ROW]
[ROW][C]Q1_6 excluded[/C][C]0.6744[/C][C]0.6778[/C][C]0.6766[/C][C]0.2596[/C][/ROW]
[ROW][C]Q1_12 excluded[/C][C]0.6879[/C][C]0.6928[/C][C]0.7037[/C][C]0.2732[/C][/ROW]
[ROW][C]Q1_16 excluded[/C][C]0.7046[/C][C]0.7073[/C][C]0.7009[/C][C]0.2871[/C][/ROW]
[ROW][C]Q1_19 excluded[/C][C]0.6639[/C][C]0.6714[/C][C]0.6763[/C][C]0.254[/C][/ROW]
[ROW][C]Q1_24 excluded[/C][C]0.6649[/C][C]0.6667[/C][C]0.6708[/C][C]0.25[/C][/ROW]
[ROW][C]Q1_30 excluded[/C][C]0.7152[/C][C]0.7189[/C][C]0.7274[/C][C]0.2989[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=107776&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107776&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 itmes0.72640.72980.74080.2784
Q1_4 excluded0.74270.7440.73270.3264
Q1_6 excluded0.67440.67780.67660.2596
Q1_12 excluded0.68790.69280.70370.2732
Q1_16 excluded0.70460.70730.70090.2871
Q1_19 excluded0.66390.67140.67630.254
Q1_24 excluded0.66490.66670.67080.25
Q1_30 excluded0.71520.71890.72740.2989


Figures (Output of Computation)

Input Parameters & R Code

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')