Validity of Adult Psychopathology Model Using Psychiatric Patients Sample From a Developing Country: Confirmatory Factor Analysis

Objectives: This study aimed to test and validate the two-factors measurement model of the Millon Clinical Multiaxial Inventory (MCMI). Specifically, this paper reported construct, convergent and divergent validities of the internalizing-externalizing MCMI model of adult psychopathology using a psychiatric sample from a developing society, the Republic of Yemen. Methods: MCMI was distributed among 232 outpatients from the Hospital of Taiz City and two private psychiatry clinics in Yemen; data were collected using structured interviews in four months. The Maximum Likelihood (ML) was used in Exploratory Factor Analysis (EFA) and the Confirmatory Factory Analysis (CFA) to explore and confirm the latent underlying MCMI and verifying evidence of convergent and discriminate validity. Results: The CFA results indicated that MCMI was a good fit for the internalizing-externalizing model of adult psychopathology. The results of the CFA confirmed that evidence of convergent and discriminant validity characterized MCMI with the internalizing and externalizing model. Conclusion: The adult psychopathology of internalizing and externalizing is a valid model by MCMI with ten personality disorders and eight clinical syndromes. Thus, practical clinical implications are suggested.