Perceived usefulness to others correlates with better cognitive performance in adults over 50, with this relationship mediated by depressive symptom burden and moderated by cognitive reserve. The finding suggests that psychological sense of purpose operates as a modifiable factor in cognitive aging trajectories.
Key Points
- Feeling useful predicts cognitive performance independent of age
- Depression mediates the usefulness-cognition relationship
- Cognitive reserve strengthens protective effect of purpose
Longevity Analysis
Purpose and social contribution appear to influence cognitive aging through measurable psychological and neurobiological pathways. The protective mechanism involves both mood state regulation and the accumulated neural efficiency that builds from education and cognitive engagement over time. This positions perceived usefulness as a modifiable intervention target—distinct from fixed traits—that practitioners can address through reframing purpose and reducing depressive burden to support cognitive longevity.
Original published by SAGE Research on Aging, by Ella Cohn-Schwartz, Rabia Khalaila1Gerontology Program, Department of Epidemiology, Biostatistics, and Community Health Sciences, School of Public Health, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be’er Sheva, Israel261315Department of Nursing, Zefat Academic College, Zefat, Israel.