“…Although not entirely consistent across studies, research to date investigating the implications of physiological linkage on relationship functioning has generally found that heightened covariation in physiological signals is related to poorer couple functioning, such as lower relationship satisfaction, insecure attachment style, increased demand-withdraw behavior during conflict, lower levels of social support, greater negative affect reactivity, and increased inflammatory biomarkers (e.g., Chaspari et al, 2015; Coutinho et al, 2019; Ha et al, 2016; Levenson & Gottman, 1983; Liu et al, 2013; Phan et al, 2019; Saxbe & Repetti, 2010; Timmons, Baucom, et al, 2017; Wilson et al, 2018). It is possible that couples with lower levels of relationship satisfaction may in general exhibit heightened reactivity to their partners’ emotional states, leading to conflict escalation and increased fighting relative to more satisfied couples.…”