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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 11:42:57 +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/t1286883735k8h5ow855cpn440.htm/, Retrieved Thu, 20 Feb 2025 18:59:17 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=82857, Retrieved Thu, 20 Feb 2025 18:59:17 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact909

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 11:42:57] [d76b387543b13b5e3afd8ff9e5fdc89f] [Current]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-14 17:52:43] [2960375a246cc0628590c95c4038a43c]
-           [Cronbach Alpha] [] [2010-10-18 18:10:03] [1251ac2db27b84d4a3ba43449388906b]
-             [Cronbach Alpha] [ws 3 question 2] [2010-10-19 19:37:58] [a8a0ff0853b70f438be515083758c362]
- R         [Cronbach Alpha] [WS3-2 EXTR] [2012-10-15 08:06:05] [74be16979710d4c4e7c6647856088456]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-14 17:55:48] [2960375a246cc0628590c95c4038a43c]
-           [Cronbach Alpha] [Extrinsic motivat...] [2010-10-14 18:01:07] [2960375a246cc0628590c95c4038a43c]
-           [Cronbach Alpha] [] [2010-10-18 18:11:01] [1251ac2db27b84d4a3ba43449388906b]
-             [Cronbach Alpha] [ws3 question 2b] [2010-10-19 19:45:33] [a8a0ff0853b70f438be515083758c362]
-           [Cronbach Alpha] [] [2010-10-18 18:13:51] [1251ac2db27b84d4a3ba43449388906b]
-             [Cronbach Alpha] [ws3 question 2c] [2010-10-19 19:47:36] [a8a0ff0853b70f438be515083758c362]
- R         [Cronbach Alpha] [WS3-2 EXTR2] [2012-10-15 08:08:44] [74be16979710d4c4e7c6647856088456]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-14 17:58:22] [2960375a246cc0628590c95c4038a43c]
- R         [Cronbach Alpha] [WS3-2 EXTR3] [2012-10-15 08:11:18] [74be16979710d4c4e7c6647856088456]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-15 08:54:59] [aeb27d5c05332f2e597ad139ee63fbe4]
-    D    [Cronbach Alpha] [Cronbach A -EM In...] [2010-10-15 08:52:45] [56d90b683fcd93137645f9226b43c62b]
-    D    [Cronbach Alpha] [] [2010-10-15 11:53:50] [ed939ef6f97e5f2afb6796311d9e7a5f]
-    D      [Cronbach Alpha] [] [2010-10-15 11:56:41] [ed939ef6f97e5f2afb6796311d9e7a5f]
-    D        [Cronbach Alpha] [] [2010-10-15 11:59:07] [ed939ef6f97e5f2afb6796311d9e7a5f]
-               [Cronbach Alpha] [Question 2 part 3] [2010-10-17 11:50:00] [ca5ab8c53423c489dac59e1a1d654047]
-               [Cronbach Alpha] [Workshop 3] [2010-10-17 11:54:12] [5ddc7dfb25e070b079c4c8fcccc4d42e]
-             [Cronbach Alpha] [Question 2 part 2] [2010-10-17 11:48:52] [ca5ab8c53423c489dac59e1a1d654047]
-             [Cronbach Alpha] [Workshop 3] [2010-10-17 11:52:07] [5ddc7dfb25e070b079c4c8fcccc4d42e]
-           [Cronbach Alpha] [Question 2 part 1] [2010-10-17 11:46:44] [ca5ab8c53423c489dac59e1a1d654047]
-           [Cronbach Alpha] [Workshop 3] [2010-10-17 11:49:33] [5ddc7dfb25e070b079c4c8fcccc4d42e]
-    D    [Cronbach Alpha] [Taak 2 - Extr. 1] [2010-10-15 11:56:49] [c289bfbb56808c5d93a0f55b5d39f5bd]
-    D    [Cronbach Alpha] [Taak 2 - Extr. 2] [2010-10-15 11:56:49] [c289bfbb56808c5d93a0f55b5d39f5bd]
F    D    [Cronbach Alpha] [Task 3.2] [2010-10-15 11:58:46] [39c51da0be01189e8a44eb69e891b7a1]
-    D    [Cronbach Alpha] [] [2010-10-15 13:10:16] [d39e5c40c631ed6c22677d2e41dbfc7d]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-16 09:36:46] [033eb2749a430605d9b2be7c4aac4a0c]
-    D    [Cronbach Alpha] [WS3 Task2 b] [2010-10-16 11:13:22] [1fd136673b2a4fecb5c545b9b4a05d64]
- RM        [Cronbach Alpha] [] [2011-10-18 16:58:13] [74be16979710d4c4e7c6647856088456]
-    D    [Cronbach Alpha] [Question 2: extri...] [2010-10-16 14:14:41] [62f7c80c4d96454bbd2b2b026ea9aad9]
F    D    [Cronbach Alpha] [Extrinsic 2 - In...] [2010-10-16 14:30:34] [48146708a479232c43a8f6e52fbf83b4]
-         [Cronbach Alpha] [Question 2 result 2 ] [2010-10-16 17:39:33] [74be16979710d4c4e7c6647856088456]
-    D    [Cronbach Alpha] [Ext2 Cronbach's α] [2010-10-16 17:44:23] [504b6ff240ec7a3fcbc007044ae7a0bb]
F    D    [Cronbach Alpha] [extr.2] [2010-10-17 08:46:27] [c1605865773cc027e55b238d879a644c]
-    D    [Cronbach Alpha] [] [2010-10-17 13:25:52] [22937c5b58c14f6c22964f32d64ff823]
-    D    [Cronbach Alpha] [Task 2: Extrinsic...] [2010-10-17 14:19:37] [6ca0fc48dd5333d51a15728999009c83]
-           [Cronbach Alpha] [ws3.1.2 introjected] [2010-10-19 11:37:13] [e4076051fbfb461c886b1e223cd7862f]
-             [Cronbach Alpha] [] [2010-10-19 19:20:24] [76e72a1b37cce9a27058d2e4927e5bf5]
-    D        [Cronbach Alpha] [WS3 oef 2] [2010-10-19 21:03:15] [5278e0a58c5de897b31ce79607e774d7]
-    D        [Cronbach Alpha] [] [2010-10-19 23:23:04] [93b680a2d8d992e1eb89148dafc4c61c]
- R             [Cronbach Alpha] [WS3 T2'] [2011-10-16 17:46:52] [91ce4971c808115c699d50336245df56]
-    D    [Cronbach Alpha] [Extrinsic motivat...] [2010-10-17 14:39:17] [95e8426e0df851c9330605aa1e892ab5]
F    D    [Cronbach Alpha] [WS3 - Cronbach Al...] [2010-10-17 15:34:42] [b11c112f8986de933f8b95cd30e75cc2]
-    D    [Cronbach Alpha] [] [2010-10-17 18:20:41] [22937c5b58c14f6c22964f32d64ff823]
-    D    [Cronbach Alpha] [Extr. 2 Introject...] [2010-10-17 18:36:31] [49c7a512c56172bc46ae7e93e5b58c1c]
-         [Cronbach Alpha] [] [2010-10-18 08:49:30] [6501d0caa85bd8c4ed4905f18a69a94d]

[Truncated]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
5	7	4	5
4	4	4	4
5	4	5	5
4	4	5	5
4	4	4	4
6	6	6	5
5	4	4	4
3	2	2	5
4	6	5	4
4	3	5	4
2	6	5	6
5	5	6	4
3	4	3	3
5	5	5	5
6	7	7	7
4	4	5	4
3	1	2	2
6	6	7	6
7	7	5	7
2	4	3	4
6	5	3	5
4	4	1	6
1	1	2	1
4	4	5	3
3	2	5	4
6	6	7	5
6	6	7	5
3	3	2	1
6	5	4	4
4	5	5	5
7	6	6	6
4	5	5	5
4	4	5	5
3	4	4	4
4	1	3	4
6	5	6	4
3	3	3	3
2	4	5	4
7	7	7	7
7	7	5	6
5	5	5	4
5	5	5	5
6	7	6	5
7	7	5	7
6	7	6	6
3	2	2	5
4	3	2	3
4	2	4	5
4	4	5	4
2	4	3	5
4	4	4	4
3	4	2	2
5	5	5	5
3	4	2	2
5	5	6	6
5	5	5	5
4	5	5	5
5	5	5	2
5	5	5	6
6	5	6	6
4	4	5	5
4	5	5	3
7	7	7	6
6	6	6	7
5	5	4	5
6	5	5	6
6	6	6	6
5	5	5	5
4	5	5	5
2	3	2	4
7	5	5	5
5	5	6	6
5	4	3	4
6	5	5	4
6	6	6	6
4	4	4	4
4	4	4	4
6	6	5	5
6	4	7	7
5	5	2	4
7	6	7	7
3	3	3	2
6	5	6	4
5	5	5	5
6	5	6	3
7	7	7	6
4	6	5	5
2	4	3	3
3	2	2	1
5	6	5	5
5	3	5	5
6	6	6	6
3	3	5	5
3	5	5	5
5	5	5	5
5	5	5	5
3	5	6	5
4	4	4	5
1	4	5	6
7	6	6	7
4	2	5	4
7	7	5	3
4	4	4	5
5	6	6	6
5	6	6	4
6	4	5	4
4	5	3	2
4	4	5	4
4	4	3	1
6	6	6	6
4	4	4	6
3	5	6	6
3	3	5	5
5	5	5	5
5	6	6	5
3	3	4	2
4	5	3	4
5	4	4	4
5	6	5	6
3	3	4	2
3	4	2	5
5	6	6	6
3	4	3	5
4	5	4	4
7	7	7	7
6	5	6	3
5	6	6	6
2	2	7	2
4	5	5	4
6	6	5	6
6	3	5	5
5	6	6	6
4	2	2	4
4	4	4	4
5	5	7	6
3	3	4	3
5	5	7	5
5	5	4	4
5	6	7	5
6	5	5	4
4	2	2	2
3	5	5	4
3	5	3	7
4	4	3	4
5	6	6	6
5	5	3	4
3	4	4	6
6	4	6	6
5	5	5	5
4	5	6	5
5	4	5	5
4	6	2	6
7	6	5	4
5	7	6	2
3	7	7	5
5	5	4	4
2	4	4	6
4	4	4	4
3	3	5	5
4	4	4	4
5	4	4	4
4	4	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'RServer@AstonUniversity' @ vre.aston.ac.uk

\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 & 'RServer@AstonUniversity' @ vre.aston.ac.uk \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=82857&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]'RServer@AstonUniversity' @ vre.aston.ac.uk[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=82857&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=82857&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'RServer@AstonUniversity' @ vre.aston.ac.uk






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.82480.82480.78660.5406
Q6 excluded0.78060.78060.70660.5426
Q13 excluded0.74430.74390.66350.492
Q20 excluded0.77520.77520.71150.5348
Q27 excluded0.81340.81390.74830.5932

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8248 & 0.8248 & 0.7866 & 0.5406 \tabularnewline
Q6 excluded & 0.7806 & 0.7806 & 0.7066 & 0.5426 \tabularnewline
Q13 excluded & 0.7443 & 0.7439 & 0.6635 & 0.492 \tabularnewline
Q20 excluded & 0.7752 & 0.7752 & 0.7115 & 0.5348 \tabularnewline
Q27 excluded & 0.8134 & 0.8139 & 0.7483 & 0.5932 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=82857&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]0.8248[/C][C]0.8248[/C][C]0.7866[/C][C]0.5406[/C][/ROW]
[ROW][C]Q6 excluded[/C][C]0.7806[/C][C]0.7806[/C][C]0.7066[/C][C]0.5426[/C][/ROW]
[ROW][C]Q13 excluded[/C][C]0.7443[/C][C]0.7439[/C][C]0.6635[/C][C]0.492[/C][/ROW]
[ROW][C]Q20 excluded[/C][C]0.7752[/C][C]0.7752[/C][C]0.7115[/C][C]0.5348[/C][/ROW]
[ROW][C]Q27 excluded[/C][C]0.8134[/C][C]0.8139[/C][C]0.7483[/C][C]0.5932[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=82857&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=82857&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 itmes0.82480.82480.78660.5406
Q6 excluded0.78060.78060.70660.5426
Q13 excluded0.74430.74390.66350.492
Q20 excluded0.77520.77520.71150.5348
Q27 excluded0.81340.81390.74830.5932


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')