title: Using the five-factor model to identify a new personality disorder domain: the case for experiential permeability.
abstract: Two studies were conducted to demonstrate that maladaptive aspects of high and low Openness to Experience were related to characterological impairment and that this aspect of personality may define a new domain of personality dysfunction. The 55-item Experiential Permeability Inventory (EPI; containing 4 scales) was developed and demonstrated to have acceptable psychometric properties. Evidence of convergent, discriminant, and incremental validity was provided. These studies provide a methodological framework for identifying and developing aspects of personality dysfunction that can expand the comprehensiveness of the current set of Axis II disorders. Theoretical implications of the EPI are discussed.
authors.affiliation: Department of Pastoral Counseling, Loyola College in Maryland, Columbia, MD 21093, USA. rpiedmont@loyola.edu
authors.forename: Ralph L
authors.initials: RL
authors.lastname: Piedmont
authors.forename: Martin F
authors.initials: MF
authors.lastname: Sherman
authors.forename: Nancy C
authors.initials: NC
authors.lastname: Sherman
authors.forename: Gabriel S
authors.initials: GS
authors.lastname: Dy-Liacco
authors.forename: Joseph E G
authors.initials: JE
authors.lastname: Williams
mesh_terms: D000293:Adolescent; D000328:Adult; D002605:Character; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008960:Models, Psychological; D010551:Personality / Q000145:classification; D010554:Personality Disorders / Q000145:classification / Q000175:diagnosis*; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D009626:Terminology as Topic