[Internal validation of a measurement scale: relation between principal component analysis, Cronbach's alpha coefficient and intra-class correlation coefficient].
The objective is to establish a simple relationship between two frequently used validation techniques which have been developed in the literature along the same lines: Principal Component Analysis and Cronbach's alpha. We have shown that under certain conditions, it is possible to estimate the reliability by using the results of a Principal Component Analysis only. Moreover, we report the relation between Cronbach's alpha and intraclass correlation coefficient, which are both used to estimate the reliability of continuous measures.
Moret
L
L
INSERM U21, Villejuif.
Mesbah
M
M
Chwalow
J
J
Lellouch
J
J
D003627:Data Interpretation, Statistical; D006801:Humans; D015233:Models, Statistical; D011594:Psychometrics
Validation interne d'une échelle de mesure: relation entre analyse en composantes principales, coefficient alpha de Cronbach et coefficient de corrélation intra-classe.