Objective: To evaluate the psychometric properties and validity of an expanded set of community enfranchisement items that are suitable for computer adaptive testing.
Setting: Community setting.
Participants: Individuals with disabilities (N=1163) were recruited from an online panel generation company (51%), former rehabilitation inpatients (18%), disability community organizations (13%), a registry of rehabilitation patients (10%), and Traumatic Brain Injury and Spinal Cord Injury Model System facilities (8%). Inclusion criteria were a self-identified disability, aged ≥18 years, and the ability to read and speak English.
Main outcome measure: Community enfranchisement.
Results: Exploratory and confirmatory factor analyses of the 48 enfranchisement items suggested 2 distinct subsets of items: (1) importance of participation and (2) control over participation. Principal components analysis of the residuals suggested that the 2 item sets are unidimensional. Rating scale analysis provided evidence that the 2 item sets fit the Rasch model. Importance and control were moderately correlated with each other and with disability severity.
Conclusions: Importance of participation and control over participation define 2 distinct sets of participation enfranchisement. Preliminary evidence supports their validity.
Keywords: CFA; CFI; DIF; EFA; ICF; IRT; International Classification of Functioning, Disability and Health; PCA; Psychometrics; Quality of life; RMSEA; Rehabilitation; Social participation; comparative fit index; confirmatory factor analysis; differential item functioning; exploratory factor analysis; item response theory; principal components analysis; root mean square error of approximation.
Copyright © 2013 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.