title: Longitudinal multigroup invariance analysis of the satisfaction with food-related life scale in university students.
abstract: This study examined longitudinal measurement invariance in the Satisfaction with Food-related Life (SWFL) scale using follow-up data from university students. We examined this measure of the SWFL in different groups of students, separated by various characteristics. Through non-probabilistic longitudinal sampling, 114 university students (65.8% female, mean age: 22.5) completed the SWFL questionnaire three times, over intervals of approximately one year. Confirmatory factor analysis was used to examine longitudinal measurement invariance. Two types of analysis were conducted: first, a longitudinal invariance by time, and second, a multigroup longitudinal invariance by sex, age, socio-economic status and place of residence during the study period. Results showed that the 3-item version of the SWFL exhibited strong longitudinal invariance (equal factor loadings and equal indicator intercepts). Longitudinal multigroup invariance analysis also showed that the 3-item version of the SWFL displays strong invariance by socio-economic status and place of residence during the study period over time. Nevertheless, it was only possible to demonstrate equivalence of the longitudinal factor structure among students of both sexes, and among those older and younger than 22 years. Generally, these findings suggest that the SWFL scale has satisfactory psychometric properties for longitudinal measurement invariance in university students with similar characteristics as the students that participated in this research. It is also possible to suggest that satisfaction with food-related life is associated with sex and age.
authors.affiliation: Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile. Electronic address: berta.schnettler@ufrontera.cl.
authors.forename: Berta
authors.initials: B
authors.lastname: Schnettler
authors.affiliation: Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile.
authors.forename: Horacio
authors.initials: H
authors.lastname: Miranda
authors.affiliation: LICSA, Núcleo Científico y Tecnológico en Ciencias Sociales, Universidad de La Frontera, Temuco, Chile.
authors.forename: Edgardo
authors.initials: E
authors.lastname: Miranda-Zapata
authors.affiliation: Centro de Piscología Económica y del Consumo, Núcleo Científico y Tecnológico en Ciencias Sociales, Universidad de La Frontera, Temuco, Chile.
authors.forename: Natalia
authors.initials: N
authors.lastname: Salinas-Oñate
authors.affiliation: MAPP Centre, Aarhus University, Denmark.
authors.forename: Klaus G
authors.initials: KG
authors.lastname: Grunert
authors.affiliation: Facultad de Economía y Negocios, Universidad de Talca, Talca, Chile.
authors.forename: Germán
authors.initials: G
authors.lastname: Lobos
authors.affiliation: Centro de Piscología Económica y del Consumo, Núcleo Científico y Tecnológico en Ciencias Sociales, Universidad de La Frontera, Temuco, Chile; Department of Psychology, University of Sheffield, Sheffield, United Kingdom.
authors.forename: José
authors.initials: J
authors.lastname: Sepúlveda
authors.affiliation: Centro de Piscología Económica y del Consumo, Núcleo Científico y Tecnológico en Ciencias Sociales, Universidad de La Frontera, Temuco, Chile; Department of Psychology, University of Sheffield, Sheffield, United Kingdom.
authors.forename: Ligia
authors.initials: L
authors.lastname: Orellana
authors.affiliation: Centro de Piscología Económica y del Consumo, Núcleo Científico y Tecnológico en Ciencias Sociales, Universidad de La Frontera, Temuco, Chile.
authors.forename: Clementina
authors.initials: C
authors.lastname: Hueche
authors.affiliation: Magíster en Sistemas de Gestión Integral de la Calidad, Universidad de La Frontera, Temuco, Chile.
authors.forename: Héctor
authors.initials: H
authors.lastname: Bonilla
mesh_terms: D000704:Analysis of Variance; D005163:Factor Analysis, Statistical; D005260:Female; D005500:Follow-Up Studies; D005518:Food Preferences / Q000523:psychology*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D010549:Personal Satisfaction; D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D012737:Sex Factors; D012959:Socioeconomic Factors; D013334:Students / Q000523:psychology*; D011795:Surveys and Questionnaires; D013997:Time Factors; D014495:Universities; D055815:Young Adult
keywords: Longitudinal analysis; Measurement invariance; Multigroup; Satisfaction with food-related life; University students