personality composite of optimism and aggression (Spotts et al., 2005a). Here we extend this work to show that genetic effects on marital quality are shared in common with the internalizing spectrum, which includes a neurotic personality style. Hopefully this will stimulate future research into how marital relationships, and other interpersonal relationships, can act as an environmental stressor that allows for the expression of psychopathology for those with an inherited vulnerability.
