This study presents a review of the existing literature concerning the relationship between types of social network and cognitive functioning during aging. The primary intent of the study was to identify the nature of this relationship. The study examined relevant literature published between 2008 and 2019 using searches of 4 scientific databases: PubMed, CINAHL, Embase, and PsycINFO. This study identified the relationship between social-network types and cognitive decline. The relationship is influenced by quantitative rather than qualitative variables of social networks, and it was found that associated with cognitive changes in episodic memory, working memory, and processing speed. The mechanism by which social networks influence cognitive function has been unclear. This study identified cognitive-ability variables related to social-network variables that have a major impact on cognitive function.
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