方法对比

	Rasch Analysis of Disability Measures	Participation and Environment Measure
领域	Disability Studies	Disability Studies
方法族	Latent structure	Latent structure
起源年份	2007	2011
提出者	Georg Rasch (model); Alan Tennant & Philip Conaghan (rehabilitation application)	Wendy Coster, Mary Law, Gary Bedell, Mary Khetani et al.
类型	Probabilistic item-response measurement model applied to disability scales	Parent-report participation-and-environment measurement instrument
开创性文献	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.	Coster, W., Bedell, G., Law, M., Khetani, M. A., Teplicky, R., Liljenquist, K., Gleason, K., & Kao, Y.-C. (2011). Psychometric evaluation of the Participation and Environment Measure for Children and Youth. Developmental Medicine & Child Neurology, 53(11), 1030-1037.
别名	Rasch Measurement Model for Disability, Rasch Analysis of Outcome Measures, Rasch Modeling in Rehabilitation, Rasch Calibration of Disability Scales	PEM-CY, Participation and Environment Measure for Children and Youth, Children's Participation and Environment Measure, PEM Child Participation Measure
相关	3	3
摘要	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 Participation and Environment Measure for Children and Youth (PEM-CY) is a caregiver-report instrument that measures how children aged 5 to 17, with and without disabilities, participate in the home, school, and community, and the environmental supports and barriers that shape that participation. Developed by Wendy Coster, Mary Law, Gary Bedell, Mary Khetani and colleagues and published in 2011-2012, the PEM-CY operationalizes the participation construct of the World Health Organization's International Classification of Functioning, Disability and Health (ICF) by asking, for each setting, how often a child takes part, how involved they are, and whether the family desires change, alongside ratings of which environmental features help or hinder. Its distinctive contribution is to measure participation and environment together rather than treating the environment as a separate afterthought.