Destructive communication and hostile interactions between spouses are associated with poor behavior maintenance and can elicit substantial... Show moreDestructive communication and hostile interactions between spouses are associated with poor behavior maintenance and can elicit substantial increases in systolic blood pressure, heart rate, and cardiac output in patients (Broadwell, & Light, 2005; Nealey-Moore et al., 2007; Ryan & Deci, 2000). This negatively impacts the cardiovascular health of the targeted partner (Nealey-Moore et al., 2007; Ryan & Deci, 2000; Smith et al., 2009). Constructive, non-hostile criticism between partners may bolster behavior change and maintenance (Zinbarg, 2007). The present study assesses the relationship between forms of criticism and reports of marital adjustment, autonomous support, health functioning, and health behavior change in a sample of couples participating in a cardiac risk reduction intervention. Results indicate that Hostile Criticism predicted Physical Health Functioning. Further, there were no significant moderating relationships. Interpretation of results and future directions are discussed. Ph.D. in Psychology, July 2017 Show less