“…The HPA axis also appears to be specifically sensitive to social inputs, including social evaluative threat (Dickerson & Kemeny, 2004); momentary social contacts, or "social zeitgebers" (Stetler, Dickerson, & Miller, 2004); and social support (Kirschbaum, Klauer, Filipp, & Hellhammer, 1995). Marital quality and attachment style have also been linked with HPA axis functioning, both in terms of reactivity to laboratory-based conflict interactions (e.g., KiecoltGlaser et al, 1993;Kiecolt-Glaser et al, 1996;Malarkey, KiecoltGlaser, Pearl, & Glaser, 1994;Powers, Pietromonaco, Gunlicks, & Sayer, 2006) and in daily life (e.g., Adam & Gunnar, 2001;Saxbe, Repetti, & Nishina, 2008). Due to its sensitivity to both social threat and social support, the HPA axis appears to be a fruitful physiological system to target in studying within-couple processes.…”