title: Factorial validity of the Supports Intensity Scale (SIS).
abstract: The Supports Intensity Scale (SIS) was developed to provide information on the support needs of persons with intellectual disability. Our aim here was to evaluate the factorial validity of the SIS in a sample of 14,862 persons with intellectual disability. The structure of the instrument as promulgated by the developers was tested and its stability evaluated across gender, age, disability complexity, and disability severity groups. Confirmatory factor analysis supported the originally proposed subscale structure. The six-factor structure yielded strict factorial invariance across gender, age, and disability complexity, whereas invariance of factor configuration was merely established across disability severity groups. Possible explanations and implications of these findings are discussed.
authors.affiliation: Department of Educational Sciences/Centre for Methodology of Educational Research, K.U.Leuven, University of Leuven, Leuven, Belgium. sofie.kuppens@ped.kuleuven.be
authors.forename: Sofie
authors.initials: S
authors.lastname: Kuppens
authors.forename: Goele
authors.initials: G
authors.lastname: Bossaert
authors.forename: Wil
authors.initials: W
authors.lastname: Buntinx
authors.forename: Catherin
authors.initials: C
authors.lastname: Molleman
authors.forename: Ann
authors.initials: A
authors.lastname: Van den Abbeele
authors.forename: Bea
authors.initials: B
authors.lastname: Maes
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001530:Belgium; D004185:Disability Evaluation; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000534:rehabilitation*; D008297:Male; D008875:Middle Aged; D020380:Needs Assessment / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012944:Social Support; D055815:Young Adult