title: Validation and adaptation of the Norwegian version of Hayes Ability Screening Index for intellectual difficulties in a psychiatric sample.
abstract: BACKGROUND
  Intellectual disabilities (ID) among psychiatric patients have traditionally been neglected. A lack of convenient instruments and competency in ID may have worsened the conditions and treatment availability for these patients.
  
  
  OBJECTIVE
  Validation and adaptation of a screening instrument for ID (Hayes Ability Screening Index; HASI) in a psychiatric hospital setting.
  
  
  METHODS
  This is a cross-sectional study of 50 psychiatric patients in two Norwegian psychiatric hospitals comparing results of the HASI with the Wechsler Abbreviated Scale of Intelligence (WASI).
  
  
  RESULTS
  The HASI correlated well with the standard IQ test used (r= 0.67, P< 0.001). At a stated cut-off score of 85, the HASI had a sensitivity of 100% and specificity of 34%.
  
  
  CONCLUSIONS
  The HASI is a valid and time-saving screening instrument for ID among psychiatric patients. The prescribed cut-off score, however, resulted in a large number of false positives.
authors.affiliation: Forensic Department Brøset, Center for Research and Education in Forensic Psychiatry, P.O. 1803 Lade, 7440 Trondheim, Norway. erik.sondenaa@ntnu.no
authors.forename: Erik
authors.initials: E
authors.lastname: Søndenaa
authors.forename: Øyvind
authors.initials: Ø
authors.lastname: Nygård
authors.forename: Jim Aage
authors.initials: JA
authors.lastname: Nøttestad
authors.forename: Olav Martin
authors.initials: OM
authors.lastname: Linaker
mesh_terms: D000328:Adult; D017046:Cost Savings; D019091:Critical Pathways / Q000191:economics; D005260:Female; D006778:Hospitals, Psychiatric; D006801:Humans; D007361:Intelligence Tests / Q000592:standards*; D007859:Learning Disabilities / Q000175:diagnosis* / Q000209:etiology; D008297:Male; D008403:Mass Screening / Q000191:economics / Q000379:methods* / Q000592:standards; D016743:Mental Competency / Q000523:psychology*; D001523:Mental Disorders / Q000150:complications / Q000453:epidemiology; D028642:Persons with Psychiatric Disorders / Q000523:psychology; D008875:Middle Aged; D009664:Norway; D015995:Prevalence; D012680:Sensitivity and Specificity