A landmark University of Michigan study shows baby boomers experiencing sharper cognitive decline with age compared to prior generations, raising concerns for future cohorts.
Researchers analyzed cognitive test scores from over 30,000 Americans aged 50+ enrolled in the long-term Health and Retirement Study conducted by the University of Michigan.
Participants completed brief cognitive assessments every two years. The analysis spanned nearly 20 years of data, from 1996 to 2014.
Scores were segmented by birth cohorts: those born 1890-1923, Early Children of Depression (1924-1930), Late Children of Depression (1931-1941), War Babies (1942-1947), Early Baby Boomers (1948-1953), and Mid-Baby Boomers (1954-1959).
Published in The Journals of Gerontology: Series B, the findings indicate cognitive performance improved across generations, peaking with the War Babies cohort (1942-1947). However, scores began declining among early baby boomers (1948-1953) and continued falling for mid-baby boomers (1954-1959).
“It’s shocking to see this reversal after generations of rising test scores,” says lead author Hui Zheng, a sociologist at The Ohio State University. “What surprised me most is the consistency across all demographics: men and women, all races and ethnicities, and every education, income, and wealth level.”
This trend may seem surprising given baby boomers' advantages in education and healthcare access.
The researchers attribute it to rising loneliness and depression, alongside increased cardiovascular risks like obesity, hypertension, diabetes, and heart disease.
As the youngest baby boomers enter their 60s, vulnerability to Alzheimer’s and other dementias grows, potentially accelerating this decline.
If these factors persist, Generations X and Y may face similar challenges.
Yet Hui Zheng emphasizes hope: Increased physical activity, nutritious diets, and robust social connections can mitigate these risks.
