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Longitudinal multigroup invariance analysis of the satisfaction with food-related life scale in university students

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  • Berta Schnettler, Universidad de la Frontera
  • ,
  • Horacio Miranda, Universidad de la Frontera
  • ,
  • Edgardo Miranda-Zapata, Universidad de la Frontera
  • ,
  • Natalia Salinas-Oñate, Universidad de la Frontera
  • ,
  • Klaus G. Grunert
  • Germán Lobos, Universidad de Talca
  • ,
  • José Sepúlveda, Universidad de la Frontera, University of Sheffield
  • ,
  • Ligia Orellana, Universidad de la Frontera, University of Sheffield
  • ,
  • Clementina Hueche, Universidad de la Frontera
  • ,
  • Héctor Bonilla, Universidad de la Frontera
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
Original languageEnglish
Pages (from-to)91-99
Number of pages9
Publication statusPublished - 2017

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