Schnettler Berta, Miranda Horacio, Miranda-Zapata Edgardo, Salinas-Oñate Natalia, Grunert Klaus G, Lobos Germán, Sepúlveda José, Orellana Ligia, Hueche Clementina, Bonilla Héctor
Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile.
Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile.
Appetite. 2017 Jun 1;113:91-99. doi: 10.1016/j.appet.2017.02.020. Epub 2017 Feb 17.
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.
本研究利用大学生的随访数据，检验了食物相关生活满意度（SWFL）量表的纵向测量不变性。我们在不同特征分组的学生中检验了SWFL这一测量指标。通过非概率纵向抽样，114名大学生（65.8%为女性，平均年龄：22.5岁）在大约一年的间隔内完成了三次SWFL问卷。验证性因素分析用于检验纵向测量不变性。进行了两种类型的分析：第一，按时间的纵向不变性分析；第二，在研究期间按性别、年龄、社会经济地位和居住地点进行的多组纵向不变性分析。结果表明，SWFL的3项版本表现出很强的纵向不变性（相等的因素负荷和相等的指标截距）。纵向多组不变性分析还表明，SWFL的3项版本在研究期间按社会经济地位和居住地点随时间显示出很强的不变性。然而，仅能证明两性学生之间以及22岁及以上和22岁以下学生之间纵向因素结构的等效性。总体而言，这些发现表明，对于具有与参与本研究的学生相似特征的大学生，SWFL量表在纵向测量不变性方面具有令人满意的心理测量特性。也可以认为，与食物相关的生活满意度与性别和年龄有关。
