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Dispositional optimism and sleep quality: a test of mediating pathways
Bert N Uchino1, Matthew Cribbet2, Robert G Kent de Grey3
1Department of Psychology and Health Psychology Program, University of Utah, Salt Lake City, UT, USA. bert.uchino@psych.utah.edu.
Optimism positively impacts sleep quality. This study found that higher trait optimism predicted better sleep, with depression and life satisfaction acting as key psychological mediators.
Area of Science:
- Psychology
- Health Psychology
- Sleep Science
Background:
- Dispositional optimism is linked to positive physical health outcomes.
- The relationship between optimism and global sleep quality, including psychological mediators, requires further investigation.
Purpose of the Study:
- To investigate whether trait optimism predicts global sleep quality.
- To examine subjective well-being measures (depression, life satisfaction) as mediators in this relationship.
Main Methods:
- A community sample of 175 adults completed questionnaires assessing trait optimism, depression, and life satisfaction.
- Global sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI).
Main Results:
- Trait optimism was a significant predictor of better global sleep quality, as measured by the PSQI.
- Depression and life satisfaction statistically mediated the association between optimism and sleep quality in both single and multiple mediator models.
Conclusions:
- Optimism plays a crucial role in the restorative processes of sleep.
- Multiple mediator models are valuable for understanding distinct psychological pathways influencing health outcomes.
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