Cognitive abilities such as memory and attention often decline with age, and finding practical ways to slow this process remains a major public health challenge. Many strategies focus on medical risk factors, but less is known about whether social activities can make a difference.
Researchers analyzed more than 20 years of data from the U.S. Health and Retirement Study, which follows a nationally representative group of adults aged 51 and older. Participants repeatedly completed cognitive tests and reported their helping activities. The study focused on two common forms of helping: formal volunteering (unpaid work through organizations) and informal helping (unpaid help given directly to friends, neighbors, or relatives who do not live with the participant).
- Moderate formal volunteering (about 2–4 hours/week) showed the largest short-term improvement. Higher levels also supported cognition, with benefits that appeared to build particularly when volunteering was sustained. The biggest drops occurred when high time commitments to volunteering stopped.
- Informal helping showed a similar overall pattern. Low to moderate time commitments were linked to a slower rate of cognitive decline, and moving to high levels did not add clear long-term benefit beyond moderate involvement, while stopping informal helping was linked to worse cognitive outcomes and faster decline.
These patterns fit with the concept of cognitive reserve, the idea that repeated mental and social demands can help the brain keep functioning as it ages, even as underlying changes occur. Helping others may contribute by regularly engaging attention, decision-making, and social interaction. Helping behavior has also been linked to changes in stress regulation systems and immune functioning.
Although the study cannot prove cause and effect, its focus on within-person changes, timing, and dose strengthens the case that helping itself could contribute to better cognitive aging.
LINKS
Han, Sae Hwang, Jeffrey A. Burr, and Shiyang Zhang, (2025). Helping behaviors and cognitive function in later life: the impact of dynamic role transitions and dose changes. Social Science & Medicine, Volume 383, Article 118465.
Read the full article:
https://www.sciencedirect.com/science/article/abs/pii/s0277953625007968?via%3Dihub
