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[Construct validity and reliability of the Newcastle Endogeniety Index I]
J A Ramos Brieva1, A Cordero Villafáfila, E Baca García
1Servicio de Psiquiatría, Hospital Ramón y Cajal, Madrid.
Actas Luso-Espanolas De Neurologia, Psiquiatria Y Ciencias Afines
|March 1, 1997
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.