“…That is, whereas stress activates the sympathetic nervous system, an opposite trigger may decrease sympathetic system activity (Rabin et al, 1994), and promote optimal functioning. Empirical support for this notion is evident in personality research, which has demonstrated that negative traits, such as neuroticism and hostility, relate to increased mortality risk and poor health outcomes (e.g., Smith, 2006;Smith, Glazer, Ruiz, & Gallo, 2004;Smith & Williams, 1992;Suls & Bunde, 2005;Watson & Pennebaker, 1989), whereas positive traits, such as optimism, extraversion, agreeableness, and conscientiousness, relate to decreased mortality risk and better health (Friedman et al, 1993;Hampson, Goldberg, Vogt, & Dubanoski, 2006). Because of the strong correlation between personality traits and SWB, similar mechanisms may characterize the relations between well-being and health (Pressman & Cohen, 2005;Ryff & Singer, 1998).…”