Everything you think you know about aging may be wrong.
A landmark new Yale University study, tracking 11,000 people over 12 years, has found that nearly half of adults aged 65 and older showed measurable improvements in cognitive or physical function over time — not decline. And the biggest driver of that improvement? The way they thought about getting older.
The research, led by **Professor Becca Levy of the Yale School of Public Health**, challenges one of the most pervasive assumptions in medicine and culture: that aging inevitably means becoming less.
**The Numbers That Change Everything**
Drawing on data from the Health and Retirement Study — a federally supported, long-running survey of older Americans — the researchers followed participants over a 12-year period, measuring both cognitive function and physical function.
The results were striking:
- **32%** of participants showed measurable improvements in cognitive function - **28%** showed measurable improvements in physical function - Many achieved improvements that were **clinically meaningful** — not just statistical noise - These gains weren't limited to people recovering from illness; those functioning normally at the outset also improved
**Your Mind Shapes Your Aging**
Older adults with more positive beliefs about aging were significantly more likely to experience improvements in both cognition and walking speed, even after accounting for age, sex, education, chronic disease, and depression.
> *'Because age beliefs are modifiable, this opens avenues for interventions at both individual and societal levels.'* > — Professor Becca Levy, Yale School of Public Health
How you think about getting older genuinely changes how you age. The cultural story we tell about aging — that it is only loss, only decline — may be actively making people older, faster.
**Stereotype Embodiment Theory**
Professor Levy has spent decades studying what she calls 'stereotype embodiment theory' — the idea that people internalize cultural narratives about their social groups, and those narratives become self-fulfilling. A 2002 study by Levy found that older people with positive self-perceptions of aging lived an average of **7.5 years longer** than those with negative perceptions.
**What This Means**
If nearly half of adults over 65 have genuine capacity for cognitive and physical improvement, the current medical and social framework around aging may be leaving enormous human potential on the table. Exposure to positive stories about aging, contact with thriving older adults, and deliberate reframing of what later life can mean — these are low-cost, high-impact interventions that could measurably improve millions of lives.
Half of us, it turns out, get better with age. The question is whether we give ourselves — and each other — permission to believe that. 🌟
*Source: Yale School of Public Health (March 2026)*