In a sample of over 3100 older adults assessed each year for 12 years, loneliness & sense of purpose were unique predictors of cognitive decline, though past research has underestimated the reciprocal nature of this relationship.
www.researchgate.net/publication/...
This new analysis adds to that support:
pubmed.ncbi.nlm.nih.gov/39839570
reis.es/congresos/
reis.es/congresos/