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The Satisfaction with Life Survey is a 5-item instrument assessing the level of life satisfaction.
Kobau, R., Sniezek, J., Zack, M. M., Lucas, R. E., & Burns, A. (2010). Well‐being assessment: An evaluation of well‐being scales for public health and population estimates of well‐being among US adults. Applied Psychology: Health and Well-being, 2(3), 272-297.