Larger social networks are linked to better cognitive function. However, little is known about the association of cognitive function with the composition of these networks in terms of the varying levels of closeness and supportive relationships. The present study explored whether social network size at different levels was differentially associated with cognitive function in a group of community-dwelling older adults.

119 older adults (Mage= 70.71) from the Maine Aging Behavior Learning Enrichment Study completed a neuropsychological test battery measuring language, verbal memory, visuospatial memory, working memory, executive function, and processing speed abilities. The number and closeness of participants' relationships was measured using a Hierarchical Mapping Technique based on the Social Convoy model, in which participants included the names of people in their relational network within inner (closest), middle (close), and outer concentric circles.

Correlational analyses found that social network size at the total and middle-to-outer levels were statistically associated with education and better performance on measures of language, verbal memory, visuospatial memory, and executive function. However, no relationship emerged between the size of the innermost network level and cognitive function. Furthermore, statistically significant findings did not survive adjustments for the effect of education.

Broader levels of support, rather than greater intimacy, were statistically associated with better cognitive performance. Consistent with previous research, greater education was associated with larger social networks. Future research is needed to understand whether higher levels of education or other factors mediate the observed relationship.