“…Other important frameworks emphasize that individuals operate within a dyadic context, and so, beyond individuals' personal vulnerabilities and external stress, partners play an essential role in creating successful relationships, including overcoming the difficulties associated with personal vulnerabilities (Bowlby, 1973;Mikulincer & Shaver, 2007;Reis & Clark, 2013;Simpson & Overall, 2014). Partner responsiveness, a broad construct highlighted across influential relationship theories (Kelley et al, 2003;Mikulincer & Shaver, 2007;Murray & Holmes, 2011;Reis & Clark, 2013), is a likely candidate for buffering the detrimental effects of both personal vulnerabilities (e.g., depression) and external stress on marital adjustment because it may circumvent maladaptive relationship processes (e.g., negative perceptions and behavior) associated with depression and stress (e.g., Barry et al, 2019;Davila et al, 1997). The current study tested whether partners' observed responsive behavior mitigated the degree to which individuals' depressive symptoms and external stress predicted declines in relationship functioning over time.…”