The MCMI-IV: A New Normal Quartet for Parental Fitness Litigants

The Millon series (i.e., MCMI-II/MCMI-III) has a longstanding history of use in clinical and forensic settings. For forensic psychologists, the Millon series can serve as a unique tool in evaluations related to parental fitness due to its incorporation of DSM diagnostic categories and the use of base rate (BR) scores. There is limited research on parental fitness populations broadly, though previous research has found a common positive impression management style referred to as the normal quartet with forensic populations on the MCMI-III. It is unknown if there is a continued presence of the normal quartet in the MCMI-IV, published in 2015. With the current study, we examined parental fitness litigant response patterns on the MCMI-IV and assessed the presence of a normal quartet. The sample consisted of 330 parental fitness litigants in the northeast region of the United States. Results of the current study suggest a new normal quartet: elevations on the Desirability (Y), Histrionic (4A), Turbulent (4B), and Compulsive (7) scales. The clinical implications for the use of the MCMI-IV by forensic psychologists with parental fitness litigants are discussed including limitations and areas for future research.