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The present investigation sought to distinguish hope from optimism in the context of a 10-wk. prospective study involving reports of health outcomes. Gottschalk's (1985) Hope Scale and Scheier and Carver's (1987) Life Orientation Test which assesses optimism were given to subjects, along with a health questionnaire. Ten weeks later subjects were given a second health questionnaire. To rule out potential confounds we included measures of neuroticism, depression, extroversion, and social desirability. After controlling for the effects of correlated confounds, we found that lower hope scores (but not optimism) were correlated with several dimensions of reported health, including frequency and severity of illness.
Scioli et al. (Mon,) studied this question.