Re: [R] Significance test, Cronbach's Alpha

From: falissard <>
Date: Mon 05 Jun 2006 - 17:43:25 EST

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,

PS : I am not really a specialist...

Bruno Falissard
"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 :

-----Message d'origine-----
De :
[] De la part de Tom Backer Johnsen Envoyé : lundi 5 juin 2006 08:05
À :
Objet : [R] Significance test, Cronbach's Alpha


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 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 |
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