When interpreting the MCMI, it is sometimes difficult to know where the interpretive information was derived. It is based on a combination of theory and empirical relationships determined specifically through validity studies of the MCMI itself. Each of these two interpretive sources has developed over a number of years, during which
three versions of the MCMI have appeared. It is often difficult to know whether the interpretations have been empirically versus theory-based or whether they have been
derived from validity studies done on previous versions of the MCMI. If done on previous
versions, it can be rightfully argued that most of the interpretations can be transferred from these earlier versions because there has been continuity in theory and scale development. This is particularly reflected in the moderate-to-high correlations between the new and the older scales. However, practitioners must struggle with which of the interpretations have been empirically versus conceptually derived as well as which are obsolete versus still current. This problem is relevant for the MCMI as well as other similar instruments (i.e., MMPI, CPI), and it highlights the importance of clinicians’ working with the test results and integrating them with additional sources. Millon (1992) summarizes that the quality of the interpretive information is dependent on “the overall validity of the inventory, the adequacy of the theory that provides the logic underlying the separate scales, the skill of the clinician, and the interpreter’s experience with relevant populations”(p.424).
When interpreting the MCMI, it is sometimes difficult to know where the interpretive information was derived. It is based on a combination of theory and empirical relationships determined specifically through validity studies of the MCMI itself. Each of these two interpretive sources has developed over a number of years, during which
three versions of the MCMI have appeared. It is often difficult to know whether the interpretations have been empirically versus theory-based or whether they have been
derived from validity studies done on previous versions of the MCMI. If done on previous
versions, it can be rightfully argued that most of the interpretations can be transferred from these earlier versions because there has been continuity in theory and scale development. This is particularly reflected in the moderate-to-high correlations between the new and the older scales. However, practitioners must struggle with which of the interpretations have been empirically versus conceptually derived as well as which are obsolete versus still current. This problem is relevant for the MCMI as well as other similar instruments (i.e., MMPI, CPI), and it highlights the importance of clinicians’ working with the test results and integrating them with additional sources. Millon (1992) summarizes that the quality of the interpretive information is dependent on “the overall validity of the inventory, the adequacy of the theory that provides the logic underlying the separate scales, the skill of the clinician, and the interpreter’s experience with relevant populations”(p.424).
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