title: Measurement properties of the Galveston Orientation and Amnesia Test (GOAT) and improvement patterns during inpatient rehabilitation.
abstract: OBJECTIVE
  To determine the measurement properties of the Galveston Orientation and Amnesia Test (GOAT) using the Rasch model and rating scale analysis (RSA).
  
  
  METHODS
  Calibration of data collected weekly during rehabilitation.
  
  
  METHODS
  Six inpatient rehabilitation facilities.
  
  
  METHODS
  77 patients admitted for their first rehabilitation after traumatic brain injury.
  
  
  RESULTS
  Rescoring the items as dichotomies, three strata of posttraumatic amnesia (PTA) were identified. All items cohered to define a single construct and the item hierarchy confirmed their hypothesized ordering.
  
  
  CONCLUSIONS
  Equal-interval measures of PTA were developed that exhibited good reliability and validity. A self-scoring key was developed to more efficiently assess PTA.
authors.affiliation: Rehabilitation Services Evaluation Unit, Rehabilitation Institute of Chicago, Northwestern University Medical School, Chicago, Illinois 60611, USA.
authors.forename: R K
authors.initials: RK
authors.lastname: Bode
authors.forename: A W
authors.initials: AW
authors.lastname: Heinemann
authors.forename: P
authors.initials: P
authors.lastname: Semik
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000647:Amnesia / Q000175:diagnosis; D001930:Brain Injuries / Q000150:complications / Q000175:diagnosis* / Q000523:psychology / Q000534:rehabilitation*; D010054:Brief Psychiatric Rating Scale / Q000592:standards*; D003072:Cognition Disorders / Q000175:diagnosis* / Q000209:etiology; D003625:Data Collection; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D007297:Inpatients; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D012047:Rehabilitation Centers; D015203:Reproducibility of Results; D012494:Sampling Studies; D012680:Sensitivity and Specificity