title: Sample Heterogeneity and the Measurement Structure of the Multidimensional Students' Life Satisfaction Scale.
abstract: Several measurement assumptions were examined with the goal of assessing the validity of the Multidimensional Students' Life Satisfaction Scale (MSLSS), a measure of adolescents' satisfaction with their family, friends, living environment, school, self, and general quality of life. The data were obtained via a cross-sectional survey of 8,225 adolescents in British Columbia, Canada. Confirmatory factor and factor mixture analyses of ordinal data were used to examine the measurement assumptions. The adolescents did not respond to all the MSLSS items in a psychometrically equivalent manner. A correlated five-factor model for an abridged version of the MSLSS resulted in good fit when all negatively worded items and several positively worded items (the least invariant) were excluded. The abridged 18-item version of the MSLSS provides a promising alternative for the measurement of five life domains that are pertinent to adolescents' quality of life.
authors.affiliation: Department of Nursing, Trinity Western University, 7600 Glover Road, Langley, BC V2Y 1Y1, Canada.
authors.forename: Richard
authors.initials: R
authors.lastname: Sawatzky
authors.affiliation: School of Nursing, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Pamela A
authors.initials: PA
authors.lastname: Ratner
authors.affiliation: School of Nursing, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Joy L
authors.initials: JL
authors.lastname: Johnson
authors.affiliation: School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Jacek A
authors.initials: JA
authors.lastname: Kopec
authors.affiliation: ECPS, Measurement, Evaluation & Research Methodology, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Bruno D
authors.initials: BD
authors.lastname: Zumbo
keywords: Adolescence; Factor mixture analysis; Measurement; Quality of life; Validity