Abstract
The present study investigated spousal interdependencies in well-being and the sources of these interdependencies among Americans and Japanese. We collected high-powered three-wave longitudinal and cross-sectional data from a wide age range of participants (Ns = 3,012 American couples aged 26–96 and 2,307 Japanese couples aged 24–76) and assessed a variety of well-being measures. Study 1 replicated previous findings that American spouses’ well-being was positively associated with each other. Studies 2a and 2b generalized the findings of Study 1 to Japanese spouses. Both Studies 1 and 2b showed conflicting results: There were effects of mutual influence and shared environmental factors’ influences on American and Japanese spouses’ well-being in a longitudinal actor-partner interdependence model when using the cross-lagged panel model, but not when using the random intercept cross-lagged panel model. These findings illustrate that the interdependent nature of well-being is an essential feature of American and Japanese married couples.
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