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Cronbach's Alpha

by Alexandros Leontitsis

 

10 Jun 2005 (Updated 13 Jun 2005)

No BSD License  

Cronbach's alpha calculation.

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Description

This function calculates the Cronbach's alpha by quantitative answers of a questionnaire. The questionnaire's answers have to be a 2-dimensional matrix, which is the only function's input. If the result is greater than 0.8 then the answers are considered reliable. If the score is below 0.2 then the answers are not reliable at all. Note that a negative score (which may occur for statistical reasons) indicates that the answers are completely random.

Example:
X=randn(20,7);
a=cronbach(X);

MATLAB release MATLAB 7.0.1 (R14SP1)
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Comments and Ratings (2)
10 Apr 2006 Othmar Schälli  
05 Sep 2008 harry entebang  
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Tag Activity for this File
Tag Applied By Date/Time
statistics Alexandros Leontitsis 22 Oct 2008 07:50:19
probability Alexandros Leontitsis 22 Oct 2008 07:50:19
cronbach Alexandros Leontitsis 22 Oct 2008 07:50:19
alpha Alexandros Leontitsis 22 Oct 2008 07:50:19
reliability Alexandros Leontitsis 22 Oct 2008 07:50:19
 

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