[R] Significance test, Cronbach's Alpha

[falissard]

This test can be meaningfull, but only in rare circumstancies (are the items
(or raters) more consistent than what could be expected by chance?).
I would do it with R using a bootstrap procedure (Efron & Tibshirani, An
introduction to the bootstrap, p.156).
Best regards,
Bruno

PS : I am not really a specialist...

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Bruno Falissard
INSERM U669, PSIGIAM
"Paris Sud Innovation Group in Adolescent Mental Health"
Maison de Solenn
97 Boulevard de Port Royal
75679 Paris cedex 14, France
tel : (+33) 6 81 82 70 76
fax : (+33) 1 45 59 34 18
web site : http://perso.wanadoo.fr/bruno.falissard/
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-----Message d'origine-----
De : r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] De la part de Tom Backer Johnsen
Envoyé : lundi 5 juin 2006 08:05
À : r-help at stat.math.ethz.ch
Objet : [R] Significance test, Cronbach's Alpha

Hello:

I am reviewing a paper at the moment where the author reports a 
Cronbach's Alpha and adds a significance test of the value.  I was not 
aware that such a test exists.  Does it?  If so, how is it done in R?

Tom
+----------------------------------------------------------------+
| Tom Backer Johnsen, Psychometrics Unit,  Faculty of Psychology |
| University of Bergen, Christies gt. 12, N-5015 Bergen,  NORWAY |
| Tel : +47-5558-9185                        Fax : +47-5558-9879 |
| Email : backer at psych.uib.no    URL : http://www.galton.uib.no/ |
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