There are also some noteworthy limitations of the Grossman facet scales. The MCMI personality scales share some of the same test items, leading to strong intercorrelations between different personality scales. Additionally, each facet consists of less than 10 items and the items are often similar to ones in other facets of the same personality scale. Thus, it is unclear how much a facet measures a unique component of a personality scale. Furthermore, statistical analysis has found some items within the facet scales may not be consistently measuring the same component as other items on that scale, with some item alpha coefficients as low as .51. For these reasons it is recommended to use supplemental information, in addition to that provided by the facet scales, to inform any assessment or treatment decisions.