title: Psychometric properties and norms of the German ABC-Community and PAS-ADD Checklist.
abstract: OBJECTIVE
  The aim of the present study was to standardize and generate psychometric evidence of the German language versions of two well-established English language mental health instruments: the Aberrant Behavior Checklist-Community (ABC-C) and the Psychiatric Assessment Schedule for Adults with Developmental Disabilities (PAS-ADD) Checklist. New methods in this field were introduced: a simulation method for testing the factor structure and an exploration of long-term stability over two years.
  
  
  METHODS
  The checklists were both administered to a representative sample of 270 individuals with intellectual disability (ID) and, two years later in a second data collection, to 128 participants of the original sample. Principal component analysis and parallel analysis were performed. Reliability measures, long-term stability, subscale intercorrelations, as well as standardized norms were generated. Prevalence of mental health problems was examined.
  
  
  RESULTS
  Psychometric properties were mostly excellent, with long-term stability showing moderate to strong effects. The original factor structure of the ABC-C was replicated. PAS-ADD Checklist produced a similar, but still different structure compared with findings from the English language area. The overall prevalence rate of mental health problems in the sample was about 20%.
  
  
  CONCLUSIONS
  Considering the good results on the measured psychometric properties, the two checklists are recommended for the early detection of mental health problems in persons with ID.
authors.affiliation: University of Vienna, Faculty of Psychology, Liebiggasse 5, 1010 Vienna, Austria. elisabeth.zeilinger@univie.ac.at
authors.forename: Elisabeth L
authors.initials: EL
authors.lastname: Zeilinger
authors.forename: Germain
authors.initials: G
authors.lastname: Weber
authors.forename: Meindert J
authors.initials: MJ
authors.lastname: Haveman
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002658:Developmental Disabilities / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D004185:Disability Evaluation; D005260:Female; D005858:Germany; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D007807:Language Tests / Q000592:standards / Q000706:statistics & numerical data; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D008875:Middle Aged; D015995:Prevalence; D011569:Psychiatric Status Rating Scales / Q000592:standards* / Q000706:statistics & numerical data; D011594:Psychometrics / Q000379:methods* / Q000592:standards* / Q000706:statistics & numerical data; D012919:Social Behavior; D055815:Young Adult