The personality dimension of optimism is one aspect of the broader study of pain and draws a great deal of attention as a significant mediator of stress in several psychological domains, including health and clinical psychology. Because of its health-promoting effects-observed across various physical conditions-there has been growing speculation that optimism could influence the course and experience of pain. This hypothesis coincides with a burgeoning body of literature that suggests not only that psychological factors are important in the experience of pain but that they represent a major influence in the response to treatment. To date, most pain research has focused primarily on the effects of stress, adversity, and other negative psychological variables on pain-related health outcomes. For example, high levels of stress and disturbed mood are generally believed to increase the likelihood of poorer health outcomes and to exacerbate pain severity and disability among pain patients (Jensen, Turner, Romano, & Karoly, 1991;Turk, 1996;Turk & Rudy, 1988). Additionally, the relatively high incidence of psychiatric morbidity (mood, anxiety, somatization, and personality disorders) among pain patients compared with the general population provides support for the idea that psychological factors influence the pain experience, and possibly its pathogenesis (Dworkin