title: Rating scale analysis of the Agitated Behavior Scale.
abstract: OBJECTIVE
  Evaluate the measurement properties of the Agitated Behavior Scale (ABS) using rating scale analysis.
  
  
  METHODS
  Sample 1: 900 observations of 100 individuals with traumatic brain injury; Sample 2: 204 observations of 102 persons with dementia; Sample 3: 241 observations of 6 individuals with anoxia.
  
  
  RESULTS
  The calibration indicated that the rating scale was used as intended. The hierarchies of item difficulty were similar across samples. Person and item separation values were within the acceptable range for the TBI sample. Generally, the items work well together, however 3 items misfit the measurement model moderately.
  
  
  CONCLUSIONS
  Agitation as measured by the ABS is best represented as a unitary construct. Results provide additional support for the reliability and validity of the ABS.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Ohio State University, Columbus, Ohio, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Bogner
authors.forename: J D
authors.initials: JD
authors.lastname: Corrigan
authors.forename: R K
authors.initials: RK
authors.lastname: Bode
authors.forename: A W
authors.initials: AW
authors.lastname: Heinemann
mesh_terms: D001930:Brain Injuries / Q000150:complications* / Q000175:diagnosis; D003704:Dementia / Q000175:diagnosis*; D005260:Female; D006801:Humans; D002534:Hypoxia, Brain / Q000150:complications* / Q000175:diagnosis; D008297:Male; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D011594:Psychometrics; D011595:Psychomotor Agitation / Q000175:diagnosis* / Q000209:etiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013223:Statistics as Topic