The personality scales are associated with personality patterns identified in Millon's evolutionary theory and the DSM-5 personality disorders. There are two main categories of personality scales: Clinical Personality Pattern Scales and Severe Personality Pathology Scales. Each of the personality scales contain 3 Grossman Facet Scales for a total of 45 Grossman Facet Scales. When interpreting the personality scales, the authors recommend that qualified professionals interpret the Severe Personality Pathology scales before the Clinical Personality Pattern scales as the pattern of responding indicated by the Severe Personality Pathology scale scores may also affect the scores on the Clinical Personality Pattern scales (i.e. if an individual scores high on the Severe Personality Pathology scale P (Paranoid), this may also explain the pattern of scores on the Clinical Personality Pattern scales).