Examining intra- and inter-personal health effects of optimism and pessimism: The role of subjective well-being in romantic couples.

Results of actor-partner interdependence models showed that the absence of pessimism, but not the presence of optimism, was associated with better physical health at baseline and over time. Pessimism was also a stronger predictor than optimism of baseline levels in some indicators of subjective well-being. These effects were obtained intra- and interpersonally. Finally, subjective well-being explained variance in some of the effects of pessimism on levels of physical health. Implications for theory, research, and practice are discussed.