E-ISSN : 2733-4538
The purpose of this study was to develop and validate adjective scales to assess the Millon personality types in a normal population. Scale construction and validation followed a method outlined by Loevinger. Nine scales containing 178 words were developed, one for each of Millon's eight basic personalities plus a Problem Indicator scale measuring aspects of his three more severe types. Extensive reliability and validity analyses were conducted, including a factor analysis of scales. These revealed high internal consistency for each scale, high test-retest reliability over a 2-week period, and good convergent and discriminant validity based on self-report data. In factor analysis, these scales yielded dimensions which were interpreted as Affective Neuroticism, Assertiveness-Aggressiveness, Conformity, and Social Introversion-Extraversion. Research efforts focusing on Millon's theory as it applies to normals may bring a more complete understanding of the entire spectrum of personality.