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Internal reliability and construct validity of the Novaco Anger Scale-1998-S in a sample of violent prison inmates in Sweden

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In this study, the internal reliability and construct validity of the recently adapted Swedish version of the Novaco Anger Scale (NAS-1998-S; Lindqvist, Dåderman, & Hellström, Social Behavior and Personality , 8 , 773–788, 2003), as well as its scale correlations with demographic and criminality variables, were investigated. Construct validity was established by assessing the correlation pattern of the scales of NAS-1998-S with concurrent scales of similar and distinct constructs. Ninety-five male violent prisoners, ranging in age from 18 to 67 years, participated. The results demonstrated good internal reliability, consistent intrascale relationships, and appropriate construct validity of NAS-1998-S. The number of previous convictions had a moderate negative relationship with the capacity of control. Age and education correlated negatively with the NAS-1998-S scales, except Regulation. In addition to psychometric issues, the results were discussed from a clinical perspective on the offender population.

Keywords: Aggression Questionnaire-S; Novaco Anger Scale-1998-S; Provocation Inventory-S; State–Trait Anger Expression Inventory-2-S; Swedish universities Scales of Personality; violent prisoners

Document Type: Research Article


Affiliations: 1: Department of Psychology, Stockholm University, SE-106 91, Stockholm, Sweden 2: Department of Neurotec, Division of Forensic Psychiatry, Karolinska Institute, PO Box 4044, SE-141 04, Huddinge, Sweden

Publication date: 2005-06-01

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