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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, 12 Oct 2010 11:40:37 +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/2010/Oct/12/t1286883596xzh9uyle38n1i9f.htm/, Retrieved Thu, 20 Feb 2025 19:15:41 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=82856, Retrieved Thu, 20 Feb 2025 19:15:41 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact1202

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] [d76b387543b13b5e3afd8ff9e5fdc89f] [Current]
-    D    [Cronbach Alpha] [Cronbach A - EM I...] [2010-10-15 08:43:34] [56d90b683fcd93137645f9226b43c62b]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 08:52:16] [aeb27d5c05332f2e597ad139ee63fbe4]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 09:07:15] [c7506ced21a6c0dca45d37c8a93c80e0]
F    D      [Cronbach Alpha] [] [2010-10-19 07:20:09] [dc30d19c3bc2be07fe595ad36c2cf923]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 09:09:49] [c7506ced21a6c0dca45d37c8a93c80e0]
-           [Cronbach Alpha] [] [2010-10-19 07:22:09] [dc30d19c3bc2be07fe595ad36c2cf923]
F           [Cronbach Alpha] [] [2010-10-19 07:25:23] [dc30d19c3bc2be07fe595ad36c2cf923]
- RMPD    [Survey Scores] [Workshop 3 - Extr...] [2010-10-15 11:21:32] [6f0e7a2d1a07390e3505a2db8288f975]
- RM        [Cronbach Alpha] [Workshop 3 - inte...] [2010-10-15 12:10:55] [6f0e7a2d1a07390e3505a2db8288f975]
-    D    [Cronbach Alpha] [extrinsic1] [2010-10-15 11:42:48] [3074aa973ede76ac75d398946b01602f]
-    D      [Cronbach Alpha] [Extrinsic2] [2010-10-15 11:47:02] [3074aa973ede76ac75d398946b01602f]
-    D        [Cronbach Alpha] [Extrinsic3] [2010-10-15 11:50:47] [3074aa973ede76ac75d398946b01602f]
-               [Cronbach Alpha] [External regulation] [2010-10-19 08:59:44] [616fb52b46273b7e6805de1e68b3a688]
-             [Cronbach Alpha] [Introjected] [2010-10-19 08:59:01] [616fb52b46273b7e6805de1e68b3a688]
-           [Cronbach Alpha] [Identified] [2010-10-19 08:57:59] [616fb52b46273b7e6805de1e68b3a688]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 11:47:38] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
- R         [Cronbach Alpha] [WS3 T1] [2011-10-16 18:43:35] [91ce4971c808115c699d50336245df56]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 11:50:26] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 11:52:57] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D    [Cronbach Alpha] [Task 2 deel 1] [2010-10-15 11:54:04] [9f32078fdcdc094ca748857d5ebdb3de]
F    D    [Cronbach Alpha] [Task 3.2] [2010-10-15 11:54:28] [39c51da0be01189e8a44eb69e891b7a1]
-    D    [Cronbach Alpha] [Taak 2 - Extr. 1 ] [2010-10-15 11:54:20] [c289bfbb56808c5d93a0f55b5d39f5bd]
-    D    [Cronbach Alpha] [Task 2 deel 2] [2010-10-15 11:56:32] [9f32078fdcdc094ca748857d5ebdb3de]
F    D    [Cronbach Alpha] [task 2 deel 3] [2010-10-15 11:58:58] [9f32078fdcdc094ca748857d5ebdb3de]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 12:38:46] [ec7b4b7cc1a30b20be5ec01cdf2adbbd]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 12:41:17] [ec7b4b7cc1a30b20be5ec01cdf2adbbd]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 12:43:47] [ec7b4b7cc1a30b20be5ec01cdf2adbbd]
-    D    [Cronbach Alpha] [] [2010-10-15 12:57:19] [d39e5c40c631ed6c22677d2e41dbfc7d]
-    D    [Cronbach Alpha] [] [2010-10-15 13:23:57] [d39e5c40c631ed6c22677d2e41dbfc7d]
F    D    [Cronbach Alpha] [Extr. 1] [2010-10-15 14:28:01] [0175b38674e1402e67841c9c82e4a5a3]
F RMPD      [Random Number Generator - Log-Normal Distribution] [Central Limit The...] [2010-10-18 20:20:29] [8214fe6d084e5ad7598b249a26cc9f06]
F    D    [Cronbach Alpha] [Extr. 2] [2010-10-15 14:29:47] [0175b38674e1402e67841c9c82e4a5a3]
F    D    [Cronbach Alpha] [Extr. 3] [2010-10-15 14:31:47] [0175b38674e1402e67841c9c82e4a5a3]
- R  D    [Cronbach Alpha] [Extrinsic Motivat...] [2010-10-15 15:02:27] [6bc4f9343b7ea3ef5a59412d1f72bb2b]
- R         [Cronbach Alpha] [WS 3 - 2.1 Extrin...] [2011-10-17 13:26:57] [2c786c21adba4dd4c8af44dce5258f06]
- R  D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 15:06:35] [6bc4f9343b7ea3ef5a59412d1f72bb2b]
- R         [Cronbach Alpha] [WS 3 - 2.2 Extrin...] [2011-10-17 13:36:49] [2c786c21adba4dd4c8af44dce5258f06]
- R  D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 15:09:36] [6bc4f9343b7ea3ef5a59412d1f72bb2b]
- R         [Cronbach Alpha] [WS 3 - 2.3 Extrin...] [2011-10-17 13:41:16] [2c786c21adba4dd4c8af44dce5258f06]
-    D    [Cronbach Alpha] [] [2010-10-15 15:29:33] [7b479c2bada71feddb7d988499871dfc]
-    D    [Cronbach Alpha] [] [2010-10-15 15:32:46] [7b479c2bada71feddb7d988499871dfc]
-    D    [Cronbach Alpha] [] [2010-10-15 15:34:54] [7b479c2bada71feddb7d988499871dfc]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 18:38:43] [9894f466352df31a128e82ec8d720241]
-           [Cronbach Alpha] [question 2: extri...] [2010-10-18 18:17:27] [814f53995537cd15c528d8efbf1cf544]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 18:46:07] [9894f466352df31a128e82ec8d720241]
-           [Cronbach Alpha] [question 2: extri...] [2010-10-18 18:27:39] [814f53995537cd15c528d8efbf1cf544]
-    D    [Cronbach Alpha] [extrinsic motivat...] [2010-10-15 18:48:42] [9894f466352df31a128e82ec8d720241]
F           [Cronbach Alpha] [question 2: extri...] [2010-10-18 18:32:11] [814f53995537cd15c528d8efbf1cf544]

[Truncated]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
7	7	7	5
5	5	5	5
6	5	4	4
4	5	5	5
5	5	5	5
6	6	6	7
7	4	7	7
6	5	5	6
6	7	7	6
6	5	5	6
5	2	4	6
5	5	6	6
4	5	4	6
6	6	6	6
6	6	7	7
5	5	6	5
3	3	4	3
7	6	6	7
3	5	6	6
5	5	6	6
3	3	4	4
5	5	5	6
2	1	2	2
6	5	6	6
3	4	5	5
6	6	6	7
6	6	6	7
5	4	5	5
5	4	5	6
7	5	5	6
6	4	6	6
5	5	6	6
5	6	5	5
4	3	4	4
4	5	6	5
6	5	5	6
5	3	5	5
5	5	5	5
7	7	7	7
5	6	5	6
5	4	5	4
6	5	7	5
5	5	5	5
6	6	7	6
7	7	6	6
5	3	3	4
5	4	4	4
5	6	6	6
6	5	5	5
2	2	4	5
4	4	4	6
4	4	6	5
6	5	5	6
3	4	4	5
6	6	6	6
6	2	5	5
5	4	5	6
6	6	6	6
1	4	6	3
5	5	6	6
7	6	5	6
4	4	5	5
5	6	5	5
6	6	5	6
4	5	4	4
6	6	5	5
6	6	6	6
5	4	6	6
5	6	5	6
3	3	5	5
5	5	5	6
6	5	6	6
5	5	6	6
6	6	6	6
6	6	6	6
4	4	4	4
4	4	4	4
6	5	5	5
7	6	6	7
4	3	3	5
5	6	7	7
6	2	5	5
6	5	6	6
5	3	6	6
3	4	5	5
7	6	6	6
6	5	6	7
4	4	4	5
4	5	6	4
5	5	5	5
3	4	4	4
7	7	7	6
6	4	6	6
6	6	6	5
4	4	4	4
5	4	5	5
6	6	6	7
5	3	5	6
6	4	4	5
6	7	7	6
4	5	6	6
5	5	5	5
6	6	6	6
5	5	6	6
5	5	5	5
4	4	5	5
4	5	5	4
6	6	5	7
5	5	7	7
6	5	6	5
5	4	7	7
6	4	6	6
5	5	5	5
4	5	4	5
6	6	6	7
4	5	4	5
5	3	3	5
5	5	5	5
6	3	5	5
3	4	5	3
5	4	5	5
4	5	5	5
5	2	5	4
5	5	3	4
7	7	7	7
5	6	6	6
7	6	6	6
5	5	4	6
4	4	4	5
6	6	6	5
4	3	4	5
4	7	6	6
4	3	2	2
4	4	5	5
6	6	5	7
6	5	6	6
5	6	5	5
3	4	4	5
6	6	6	6
5	6	6	6
4	4	5	5
5	5	5	5
2	3	2	2
5	6	6	7
7	5	6	7
4	6	5	5
4	5	6	6
7	6	7	5
6	5	5	6
5	6	5	5
5	5	5	6
5	5	6	6
7	6	7	7
6	5	7	6
6	6	6	6
5	5	5	6
2	4	6	6
4	4	4	4
6	4	6	6
5	5	6	4
5	4	4	5
5	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 time0 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135

\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 & 'Gwilym Jenkins' @ 72.249.127.135 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=82856&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]'Gwilym Jenkins' @ 72.249.127.135[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=82856&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=82856&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'Gwilym Jenkins' @ 72.249.127.135






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.84250.84590.81150.5785
Q2 excluded0.81360.81730.75540.5986
Q9 excluded0.81270.81740.75530.5988
Q16 excluded0.7880.79090.71790.5577
Q23 excluded0.78920.79160.71870.5587

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8425 & 0.8459 & 0.8115 & 0.5785 \tabularnewline
Q2 excluded & 0.8136 & 0.8173 & 0.7554 & 0.5986 \tabularnewline
Q9 excluded & 0.8127 & 0.8174 & 0.7553 & 0.5988 \tabularnewline
Q16 excluded & 0.788 & 0.7909 & 0.7179 & 0.5577 \tabularnewline
Q23 excluded & 0.7892 & 0.7916 & 0.7187 & 0.5587 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=82856&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]0.8425[/C][C]0.8459[/C][C]0.8115[/C][C]0.5785[/C][/ROW]
[ROW][C]Q2 excluded[/C][C]0.8136[/C][C]0.8173[/C][C]0.7554[/C][C]0.5986[/C][/ROW]
[ROW][C]Q9 excluded[/C][C]0.8127[/C][C]0.8174[/C][C]0.7553[/C][C]0.5988[/C][/ROW]
[ROW][C]Q16 excluded[/C][C]0.788[/C][C]0.7909[/C][C]0.7179[/C][C]0.5577[/C][/ROW]
[ROW][C]Q23 excluded[/C][C]0.7892[/C][C]0.7916[/C][C]0.7187[/C][C]0.5587[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=82856&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=82856&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 itmes0.84250.84590.81150.5785
Q2 excluded0.81360.81730.75540.5986
Q9 excluded0.81270.81740.75530.5988
Q16 excluded0.7880.79090.71790.5577
Q23 excluded0.78920.79160.71870.5587


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')