title: [Construct validity and reliability of the Newcastle Endogeniety Index I].
abstract: The authors study the construct validity of the Newcastle's Endogeneity Index (NEI). They use the correlation matrix published originally by Carney et al (1965). The results show a high reliability of the NEI (alpha = 0.77). The Factorial Analysis shows two factors, not independent, that explain a 45% of the total obtained variance; it seem to indicate a drop construct validity of the NEI. The authors discuss the validity of the endogenous/neurotic classification of the depression because of the high agreement the NEI and the clinical criterion.
authors.affiliation: Servicio de Psiquiatría, Hospital Ramón y Cajal, Madrid.
authors.forename: J A
authors.initials: JA
authors.lastname: Ramos Brieva
authors.forename: A
authors.initials: A
authors.lastname: Cordero Villafáfila
authors.forename: E
authors.initials: E
authors.lastname: Baca García
mesh_terms: D003866:Depressive Disorder / Q000175:diagnosis / Q000523:psychology*; D005163:Factor Analysis, Statistical; D006801:Humans; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results
vernacular_title: Validez de constructo y seguridad del indice de Endogeneidad Newcastle I.