Related Experiment Video
Updated: Jul 18, 2026
Development of a Virtual Reality Assessment of Everyday Living Skills
Published on: April 23, 2014
Generalizability studies of the Global Assessment of Functioning-Split version
Geir Pedersen1, Knut Arne Hagtvet, Sigmund Karterud
1Department of Personality Psychiatry, Ullevål University Hospital, 0407 Oslo, Norway. geir.pedersen@medisin.uio.no
Objective:
The study aimed to use the Generalizability Theory to investigate the reliability and precision of the split version of the Global Assessment of Functioning (GAF).
Materials:
Six case vignettes were assessed by 2 samples; one by 19 experienced and independent raters and another by 58 experienced raters from 8 different day-treatment units, evaluating both symptom and function scores of GAF.
Methods:
Generalizability studies were conducted to disentangle relevant variance components accounting for error variance in GAF scores. Furthermore, decision studies were conducted to estimate the reliability of different measurement designs, as well as precision in terms of error tolerance ratio.
Results:
Both symptom and function scores of GAF were found to be highly generalizable, and a measurement design of 2 raters per subject was found to be most efficient with respect to reliability, precision, and use of resources.
Conclusion:
Both symptom and function scores of GAF seem highly consistent across experienced raters.
Related Concept Videos
01:22Self-Report Tests of Personality
01:29Assessment of the Gastrointestinal System II: Health Perception Pattern
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include: