title: A cluster analysis of personality style in adults with ADHD.
abstract: OBJECTIVE
  The purpose of this study was to use hierarchical linear cluster analysis to examine the normative personality styles of adults with ADHD.
  
  
  METHODS
  A total of 311 adults with ADHD completed the Millon Index of Personality Styles, which consists of 24 scales assessing motivating aims, cognitive modes, and interpersonal behaviors.
  
  
  RESULTS
  The sample was randomly divided into half, and independent hierarchical linear cluster analyses were performed on each half to identify replicable clusters. A three-cluster solution was selected, and two of the clusters were replicated across the independent analyses. Participants in Cluster 1 manifested more polarized, negative motivating aims, cognitive modes, and interpersonal behaviors than participants in Cluster two.
  
  
  CONCLUSIONS
  Hierarchical linear cluster analyses identified two very different personality styles in a sample of adults with ADHD, with implications for clinicians and future research.
authors.affiliation: Wayne State University School of Medicine, Detroit, MI, USA. arobin@med.wayne.edu
authors.forename: Arthur L
authors.initials: AL
authors.lastname: Robin
authors.forename: Angela
authors.initials: A
authors.lastname: Tzelepis
authors.forename: Marquita
authors.initials: M
authors.lastname: Bedway
mesh_terms: D000328:Adult; D000367:Age Factors; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000523:psychology*; D016000:Cluster Analysis; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D008297:Male; D010551:Personality / Q000145:classification*; D010552:Personality Assessment / Q000706:statistics & numerical data*; D010555:Personality Inventory / Q000706:statistics & numerical data; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011594:Psychometrics; D012494:Sampling Studies; D011795:Surveys and Questionnaires