방법 비교

	Rasch Analysis of Disability Measures	Wheelchair Skills Test
분야	Disability Studies	Disability Studies
계열	Latent structure	Process / pipeline
기원 연도	2007	2002
창시자	Georg Rasch (model); Alan Tennant & Philip Conaghan (rehabilitation application)	R. Lee Kirby and colleagues (Dalhousie University)
유형	Probabilistic item-response measurement model applied to disability scales	Standardized wheelchair-skills performance assessment
원전	Tennant, A., & Conaghan, P. G. (2007). The Rasch measurement model in rheumatology: What is it and why use it? When should it be applied, and what should one look for in a Rasch paper? Arthritis Care & Research, 57(8), 1358-1362.	Kirby, R. L., Dupuis, D. J., MacPhee, A. H., Coolen, A. L., Smith, C., Best, K. L., Newton, A. M., Mountain, A. D., MacLeod, D. A., & Bonaparte, J. P. (2004). The Wheelchair Skills Test (version 2.4): measurement properties. Archives of Physical Medicine and Rehabilitation, 85(5), 794-804.
별칭	Rasch Measurement Model for Disability, Rasch Analysis of Outcome Measures, Rasch Modeling in Rehabilitation, Rasch Calibration of Disability Scales	WST, Wheelchair Skills Test, Wheelchair Skills Test Questionnaire, WST-Q
관련	3	3
요약	Rasch analysis is a psychometric method, based on Georg Rasch's probabilistic measurement model, used to test and refine the disability, function, and participation scales that pervade disability and rehabilitation research. As set out for clinicians by Alan Tennant and Philip Conaghan in 2007, fitting the Rasch model checks whether a scale's items genuinely measure a single underlying trait at interval level, so that summing item scores into a total is justified. Because so many disability outcome measures simply add ordinal item ratings — assuming items are equally difficult and that ordinal categories behave like interval data — Rasch analysis provides the rigorous test of whether that common practice is actually valid.	The Wheelchair Skills Test (WST) is a standardized, objective assessment of how well a wheelchair user can perform a graded set of individual wheelchair skills, from basic maneuvers like rolling forward and turning to advanced ones like descending curbs and performing a stationary wheelie. Developed by R. Lee Kirby and colleagues at Dalhousie University and validated through a 2002 pilot and a 2004 measurement-properties study of version 2.4, the WST scores each skill for whether the user can perform it and how safely, then summarizes performance as a percentage of skills passed. It turns the diffuse notion of wheelchair mobility into a reliable, comparable, and trainable outcome.