title: [Does the Youth Psychopathic Traits Inventory (YPI) identify a clinically relevant subgroup among young offenders?].
abstract: Does the Youth Psychopathic Traits Inventory identify one or more high-risk subgroups among young offenders? Which recommendations for possible courses of action can be derived for individual clinical or forensic cases? Method: Model-based cluster analysis (Raftery, 1995) was conducted on a sample of young offenders (N = 445, age 14–22 years, M = 18.5, SD = 1.65). The resulting model was then tested for differences between clusters with relevant context variables of psychopathy. The variables included measures of intelligence, social competence, drug use, and antisocial behavior. Results: Three clusters were found (Low Trait, Impulsive/Irresponsible, Psychopathy) that differ highly significantly concerning YPI scores and the variables mentioned above. The YPI Scores Δ Low = 4.28 (Low Trait – Impulsive/Irresponsible) and Δ High = 6.86 (Impulsive/Irresponsible – Psychopathy) were determined to be thresholds between the clusters.
  
  
  
  The allocation of a person to be assessed within the calculated clusters allows for an orientation of consequent tests beyond the diagnosis of psychopathy. We conclude that the YPI is a valuable instrument for the assessment of young offenders, as it yields clinically and forensically relevant information concerning the cause and expected development of psychopathological behavior.
authors.affiliation: 1 Institute of Neuroscience and Medicine (INM-6), Computational and Systems Neuroscience & Institute for Advanced Simulation (IAS-6), Theoretical Neuroscience & JARA BRAIN Institute I, Jülich Research Centre, Jülich.
authors.forename: Daniel
authors.initials: D
authors.lastname: Mingers
authors.affiliation: 2 Hochschule Düsseldorf, University of Applied Sciences, Düsseldorf.
authors.forename: Denis
authors.initials: D
authors.lastname: Köhler
authors.affiliation: 3 Zentrum für Integrative Psychiatrie, Institut für Sexualmedizin und Forensische Psychiatrie und Psychotherapie, Kiel.
authors.forename: Christian
authors.initials: C
authors.lastname: Huchzermeier
authors.affiliation: 3 Zentrum für Integrative Psychiatrie, Institut für Sexualmedizin und Forensische Psychiatrie und Psychotherapie, Kiel.
authors.forename: Günter
authors.initials: G
authors.lastname: Hinrichs
mesh_terms: D000293:Adolescent; D000987:Antisocial Personality Disorder / Q000145:classification / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*; D016000:Cluster Analysis; D015897:Comorbidity; D005858:Germany; D006801:Humans; D007604:Juvenile Delinquency / Q000331:legislation & jurisprudence / Q000523:psychology* / Q000706:statistics & numerical data; D008297:Male; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011594:Psychometrics / Q000706:statistics & numerical data*; D018570:Risk Assessment / Q000706:statistics & numerical data; D019966:Substance-Related Disorders / Q000145:classification / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D055815:Young Adult
keywords: MBCA; YPI; antisocial personality; cluster analysis; psychopathy