title: Rasch modeling and the measurement of social participation.
abstract: Social participation is the main outcome of physical rehabilitation programs. The aim of this study is to improve the measurement of social participation, using an instrument called the Assessment of Life Habits Scale and the Rasch model. The interval level measurement, the dimensionality and the generalizability of the item hierarchy were verified. The data from a large sample of people with spinal cord injury was analyzed and specific results were compared with expert opinions. The main properties of the instrument were satisfactory and the agreement with expert opinion was high. Principal component analysis showed multidimensionality. The item difficulty hierarchy obtained with spinal cord injury experts was different from the one obtained with traumatic brain injury experts, indicating a different difficulty level of items in relation to each population characteristics. We conclude that the instrument is appropriate for the measurement of social participation and suggest ways to improve the instrument.
authors.affiliation: Institut de réadaptation en déficience physique de Québec, 525 Boul. Hamel, Quebec City, Quebec G1M 2S8, Canada. claire.dumont@irdpq.qc.ca
authors.forename: Claire
authors.initials: C
authors.lastname: Dumont
authors.forename: Richard
authors.initials: R
authors.lastname: Bertrand
authors.forename: Patrick
authors.initials: P
authors.lastname: Fougeyrollas
authors.forename: Marie
authors.initials: M
authors.lastname: Gervais
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D015233:Models, Statistical; D017063:Outcome Assessment, Health Care; D011594:Psychometrics; D012107:Research Design / Q000592:standards; D012494:Sampling Studies; D012919:Social Behavior; D013119:Spinal Cord Injuries / Q000523:psychology* / Q000534:rehabilitation