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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 computationTue, 19 Oct 2010 17:03:05 +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/Oct/19/t1287507742mq2swz8mhknany0.htm/, Retrieved Mon, 29 Apr 2024 01:49:25 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=86766, Retrieved Mon, 29 Apr 2024 01:49:25 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact119

Tree of Dependent Computations

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 11:40:37] [b98453cac15ba1066b407e146608df68]
F    D    [Cronbach Alpha] [] [2010-10-19 17:03:05] [27f38de572a508a633f0ad2411de6a3e] [Current]
Feedback Forum
2010-10-25 21:45:33 [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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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
4	7	4	5
5	6	6	6
4	6	5	5
3	5	4	5
6	6	6	6
5	7	6	7
5	7	7	7
1	7	6	7
4	7	5	6
5	6	5	6
6	4	7	6
7	6	7	7
5	6	7	7
6	7	7	7
5	6	7	7
4	6	6	5
7	4	6	7
7	7	7	7
6	7	7	6
6	6	6	6
2	3	5	6
7	7	7	6
5	5	5	4
4	7	7	7
7	6	6	7
1	5	6	5
1	5	6	5
7	6	2	6
4	5	2	2
5	6	5	7
5	6	6	6
5	5	6	6
4	4	4	6
5	5	4	6
5	4	5	6
4	6	6	6
7	6	5	5
7	7	6	6
7	7	7	7
4	7	7	6
7	7	5	7
7	5	6	6
4	6	5	6
3	6	6	6
2	3	5	6
6	6	4	5
4	5	5	6
5	4	6	5
4	6	6	7
7	6	3	5
4	6	4	6
6	5	6	5
7	6	6	7
1	5	5	7
5	7	5	6
4	6	5	6
5	6	6	6
5	7	6	5
5	4	6	6
5	3	4	1
5	4	3	4
5	4	5	5
6	5	5	6
3	4	7	7
4	6	5	4
6	7	7	7
6	6	6	6
3	6	6	5
5	6	6	6
2	6	6	6
7	7	7	7
7	6	6	6
4	6	5	4
6	6	7	6
6	7	6	6
3	5	4	5
3	4	4	5
6	7	6	6
7	7	7	7
3	6	6	5
1	7	6	7
5	6	5	5
5	5	5	5
5	7	5	7
5	6	5	5
6	5	6	5
6	6	7	7
5	5	5	5
7	7	7	4
6	6	3	6
1	2	4	5
3	5	6	7
5	7	7	5
1	7	7	6
6	7	6	6
4	7	7	4
5	6	4	6
5	5	5	5
6	6	5	6
5	6	7	6
5	5	6	6
4	7	3	4
6	5	5	6
6	6	6	7
4	5	5	5
5	5	5	5
5	5	5	5
2	5	5	7
7	7	7	7
5	6	6	5
5	7	7	7
2	6	6	6
3	5	4	4
5	5	5	5
5	7	7	7
5	6	5	5
6	5	6	4
6	7	5	6
4	4	2	7
6	3	4	5
3	7	5	5
6	5	5	6
4	6	6	7
3	4	4	3
4	7	7	7
6	7	6	6
4	5	6	6
6	7	6	6
5	3	5	6
5	6	5	6
5	5	5	5
3	5	6	6
5	6	4	6
4	5	6	6
5	6	5	6
5	6	5	6
1	7	5	7
4	5	6	7
7	7	7	6
4	6	6	6
6	6	5	5
7	7	6	6
6	7	6	6
5	5	4	6
6	7	6	7
5	5	4	5
5	6	6	6
6	7	6	6
5	6	6	6
3	5	5	6
6	6	5	4
7	7	5	6
4	6	6	6
5	7	7	7
4	7	7	7
5	6	4	6
2	6	6	6
7	4	4	4
5	7	7	5
4	6	4	6
2	4	4	5
4	5	5	5

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=86766&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=86766&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=86766&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 itmes0.58120.61920.58020.2891
Q3 excluded0.68030.68030.59080.415
Q10 excluded0.41660.46950.41570.2278
Q17 excluded0.44030.47430.40.2312
Q24 excluded0.50650.54130.46680.2823

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.5812 & 0.6192 & 0.5802 & 0.2891 \tabularnewline
Q3 excluded & 0.6803 & 0.6803 & 0.5908 & 0.415 \tabularnewline
Q10 excluded & 0.4166 & 0.4695 & 0.4157 & 0.2278 \tabularnewline
Q17 excluded & 0.4403 & 0.4743 & 0.4 & 0.2312 \tabularnewline
Q24 excluded & 0.5065 & 0.5413 & 0.4668 & 0.2823 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=86766&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]0.5812[/C][C]0.6192[/C][C]0.5802[/C][C]0.2891[/C][/ROW]
[ROW][C]Q3 excluded[/C][C]0.6803[/C][C]0.6803[/C][C]0.5908[/C][C]0.415[/C][/ROW]
[ROW][C]Q10 excluded[/C][C]0.4166[/C][C]0.4695[/C][C]0.4157[/C][C]0.2278[/C][/ROW]
[ROW][C]Q17 excluded[/C][C]0.4403[/C][C]0.4743[/C][C]0.4[/C][C]0.2312[/C][/ROW]
[ROW][C]Q24 excluded[/C][C]0.5065[/C][C]0.5413[/C][C]0.4668[/C][C]0.2823[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=86766&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=86766&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 itmes0.58120.61920.58020.2891
Q3 excluded0.68030.68030.59080.415
Q10 excluded0.41660.46950.41570.2278
Q17 excluded0.44030.47430.40.2312
Q24 excluded0.50650.54130.46680.2823


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')