Operationalises Keyes' dual continuum model — the idea that mental health (flourishing vs. languishing) is conceptually distinct from mental illness. Three components cover hedonic wellbeing, social wellbeing, and eudaimonic psychological functioning. Enables categorisation into flourishing, languishing, or moderate mental health.
Likert (0–5, never to every day) over the past month
Freely available from Corey Keyes. Three subscale scores and a total. Categorical flourishing/languishing/moderate classifications can be derived using published algorithms. Validated in 40+ countries. Pairs with PHQ-9 / GAD-7 to capture both the positive and negative continua of mental health.
Keyes, C.L.M. (2002). The mental health continuum: From languishing to flourishing in life. Journal of Health and Social Behavior, 43(2), 207–222.
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