title: Dispositional optimism and sleep quality: a test of mediating pathways.
abstract: Dispositional optimism has been related to beneficial influences on physical health outcomes. However, its links to global sleep quality and the psychological mediators responsible for such associations are less studied. This study thus examined if trait optimism predicted global sleep quality, and if measures of subjective well-being were statistical mediators of such links. A community sample of 175 participants (93 men, 82 women) completed measures of trait optimism, depression, and life satisfaction. Global sleep quality was assessed using the Pittsburgh Sleep Quality Index. Results indicated that trait optimism was a strong predictor of better PSQI global sleep quality. Moreover, this association was mediated by depression and life satisfaction in both single and multiple mediator models. These results highlight the importance of optimism for the restorative process of sleep, as well as the utility of multiple mediator models in testing distinct psychological pathways.
authors: Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA. bert.uchino@psych.utah.edu.
authors: Bert N
authors: BN
authors: Uchino
authors: Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA.
authors: Matthew
authors: M
authors: Cribbet
authors: Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA.
authors: Robert G Kent
authors: RG
authors: de Grey
authors: Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA.
authors: Sierra
authors: S
authors: Cronan
authors: Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA.
authors: Ryan
authors: R
authors: Trettevik
authors: Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA.
authors: Timothy W
authors: TW
authors: Smith
mesh_terms: D000368:Aged; D003863:Depression / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D000067656:Optimism / Q000523:psychology*; D010549:Personal Satisfaction; D010551:Personality; D012890:Sleep / Q000502:physiology*
keywords: Depression; Health; Life satisfaction; Optimism; Sleep