Ten Years of Actor and Cross‐Partner Influence on Cognitive Function: Between‐ and Within‐Couple Analysis

The between-couple findings support the similarity-attraction theory and highlight gender-specific role transitions that influence cognitive aging, while the absence of within-couple cognitive concordance may be due to the length of assessment intervals or individual differences. These findings emphasize the need for future research with more frequent assessments and better control of trait-like characteristics to clarify these dynamics and support targeted cognitive health interventions for middle-aged and older couples.