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Measurement Invariance of the Satisfaction with Life Scale (SWLS) across Age and Gender in Korea

Korean Psychological Journal of Culture and Social Issues / Korean Psychological Journal of Culture and Social Issues, (P)1229-0661; (E)1229-0661
2019, v.25 no.4, pp.305-323
https://doi.org/10.20406/kjcs.2019.11.25.4.305

Abstract

The Satisfaction With Life Scale (SWLS) is the most widely used instrument to measure life satisfaction. This study examined the factor structure and measurement equivalence of SWLS across age and gender in Korea. A total of 936 data were analyzed, comprising 433 college students (195 males and 238 females) and 503 middle-aged adults (237 males and 266 females). The results are as follows. Firstly, the data supported a modified single-factor model with correlations between error variances of items 4 and 5. Therefore, items 4 and 5 reflecting the past were found to share a distinct meaning with other items. Secondly, SWLS showed full strict invariance by gender, but only showed partial strict invariance between college students and middle-aged adults. These results indicate that meaningful comparisons of SWLS scores across gender may be valid, but careful attention should be paid when comparing age groups.

keywords
Satisfaction with life scale, life-satisfaction, measurement invariance, subjective well-being, 삶의 만족 척도, 삶의 만족도, 주관적 안녕감, 측정 동일성

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Korean Psychological Journal of Culture and Social Issues