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Dyadic contagion in cognitive function: A nationally-representative longitudinal study of older U.S. couples
1Department of Sociology, McGill University, Montreal, Quebec, Canada.
Abstract:
Later-life cognitive function is strongly influenced by one's environment. At this life stage, a partner's behaviors and attributes-including their own cognitive status-are a key environmental determinant. A recent "social allostasis" theory also yields specific predictions on patterns of mutual influence-or "contagion"-in cognitive function. Yet, no population representative studies have examined these coupled dynamics. Using recently developed fixed-effects cross-lagged panel modeling (FE-CLPM) methods and ten-year data from the Health and Retirement Study-nationally-representative of U.S. adults over 50-the current study filled this gap. Results supported dyadic cognitive contagion over the long- but not short-run. Short-term associations suggested intriguing "cognitive cycling" possibilities among both men and women that need further investigation. Overall, results supported a theoretical model of coupled "cognitive careers," and relational inducement of allostatic load. Especially among men, recurrent impulses also cumulatively induced substantial path-dependent cognitive improvements, supporting the added value of repeated over one-time interventions. Theoretical and substantive implications are discussed.
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