Loneliness May Not Directly Accelerate Memory Decline in Older Adults, Study Finds

New research suggests loneliness affects baseline memory performance but not the rate of cognitive decline over time.

Apr. 19, 2026 at 12:33am

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A translucent X-ray image showing the intricate neural structures of an elderly person's brain, conveying the fragility and complexity of the aging mind.An X-ray view into the aging brain reveals the complex interplay between loneliness and cognitive performance.NYC Today

A new study analyzing data from over 10,000 European adults aged 65-94 found that while those reporting higher levels of loneliness performed worse on memory tests at the start of the study, the rate of memory decline over a 7-year period was similar regardless of loneliness levels. The findings suggest loneliness may play a more prominent role in initial memory performance than in the progressive decline of memory over time.

Why it matters

The study adds to the ongoing debate about whether loneliness contributes to dementia risk. While loneliness is often considered a risk factor for cognitive decline, research results have been mixed. These findings highlight the importance of addressing loneliness as a factor in cognitive health, even if it may not directly accelerate memory loss.

The details

Researchers from Colombia, Spain and Sweden analyzed data from the long-running Survey of Health, Ageing and Retirement in Europe (SHARE), which tracked 10,217 older adults between 2012 and 2019. Participants were asked to recall words immediately and after a delay to measure memory performance. Loneliness was assessed using questions about how often participants felt isolated, left out or lacking companionship. About 8% of participants reported high levels of loneliness at the outset. That group tended to be older, more likely to be female and more likely to have conditions like depression. The researchers found that those with higher loneliness had lower scores on both immediate and delayed memory tests at baseline, but all groups experienced similar declines in memory over time.

  • The study tracked participants from 2012 to 2019.
  • Participants were asked about their loneliness levels at the outset of the 7-year study period.

The players

Dr. Luis Carlos Venegas-Sanabria

Lead author of the study and researcher at the School of Medicine and Health Sciences at the Universidad del Rosario.

Jordan Weiss, PhD

Scientific advisor and aging expert at Assisted Living Magazine and professor at NYU Grossman School of Medicine.

Amy Morin

Florida-based psychotherapist and author.

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What they’re saying

“The finding that loneliness significantly impacted memory, but not the speed of decline in memory over time was a surprising outcome.”

— Dr. Luis Carlos Venegas-Sanabria, Lead author of the study

“The finding that lonely older adults start with worse memory but don't decline faster is actually the most interesting part of the paper, and I think it's easy to misread.”

— Jordan Weiss, PhD, Scientific advisor and aging expert

“The evidence shows there's a link between loneliness and cognitive decline but there's no direct evidence of a cause and effect relationship.”

— Amy Morin, Psychotherapist and author

What’s next

Researchers suggest that screening for loneliness should be incorporated into routine cognitive assessments as one way to support healthy aging.

The takeaway

While loneliness may not directly accelerate memory decline in older adults, it is still an important factor to address in maintaining cognitive health. The findings highlight the complex relationship between loneliness and dementia risk, and the need for a more holistic approach to supporting brain health in later life.