[Internal validation of a measurement scale: relation between principal component analysis, Cronbach's alpha coefficient and intra-class correlation coefficient].

Leila Moret (1) , M Mesbah , J Chwalow , J Lellouch

1 SPHERE - MethodS in Patients-centered outcomes and HEalth ResEarch

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.

Domains: Life Sciences [q-bio]

Leila Moret, M Mesbah, J Chwalow, J Lellouch. [Internal validation of a measurement scale: relation between principal component analysis, Cronbach's alpha coefficient and intra-class correlation coefficient].. Epidemiology and Public Health = Revue d'Epidémiologie et de Santé Publique, 1993, 41 (2), pp.179-86. ⟨hal-03242927⟩