A snapshot of the age distribution of psychological well-being in the United States.
Level 4 - case-series / case-control
Cross-sectional survey of a large population sample (graded by design analogy for a non-clinical question)
PubMed 20479218 · doi:10.1073/pnas.1003744107
What was done
Analyzed data from a 2008 telephone survey of 340,847 people in the United States to assess age-related patterns in psychological well-being. The study evaluated both Global well-being (overall life appraisal) and Hedonic well-being (immediate affective experiences, including positive emotions as well as stress, anger, worry, and sadness), while evaluating differences by sex and covariates such as having children at home.
What was found
The abstract reports directional patterns without numeric values or effect sizes. Global well-being and positive Hedonic well-being exhibited U-shaped trajectories across age, showing increases after age 50. Negative Hedonic well-being variables followed divergent paths: stress and anger declined steeply from the early 20s onward, worry stayed elevated through middle age before declining, and sadness remained essentially flat across ages. Patterns were very similar between men and women and were not altered by covariates like having children at home.
Why it matters
It distinguishes overall cognitive life evaluation from specific daily affective experiences across the lifespan, demonstrating that multiple facets of well-being—particularly positive affect and reduced stress—improve substantially after midlife.
Limits
The cross-sectional design cannot differentiate true age-related changes from birth cohort or generational effects. All metrics rely on self-report via telephone interviews, and exact statistical estimates and effect sizes are omitted from the abstract.
Cited by
- supports Happiness across the lifespan follows a curvilinear pattern where midlife has some of the lowest levels of happiness and life satisfaction.