Social Network Size and Cognitive Functioning in Middle-Aged Adults: Cross-Sectional and Longitudinal Associations

Area of Science:

• Neuroscience
• Psychology
• Sociology

Background:

• Social networks play a crucial role in human well-being.
• The relationship between social network size and cognitive function requires further investigation, particularly in middle-aged adults.

Purpose of the Study:

• To investigate the association between social network size and cognitive abilities (episodic memory, semantic memory, visuospatial ability) in middle-aged adults.
• To examine the longitudinal impact of social network size on cognitive changes over 5 and 10 years.

Main Methods:

• Cross-sectional and longitudinal analyses of data from 804 middle-aged adults (40-60 years).
• Assessment of social network size and cognitive functions including episodic memory, semantic memory, and visuospatial ability.
• Utilized 5- and 10-year follow-up cognitive data and cross-lagged panel correlations.

Main Results:

• A positive cross-sectional association was found between social network size and all three cognitive abilities.
• Baseline social network size positively predicted 5-year changes in semantic memory and 10-year changes in both semantic and episodic memory.
• Social network size predicted future cognitive functioning, but cognitive performance did not predict future network size.

Conclusions:

• A small but significant positive relationship exists between social network size and declarative memory abilities.
• Findings support the cognitive reserve hypothesis, suggesting social engagement enhances cognitive stimulation and preserves memory functions.