OBJECTIVE Sleep and optimism are important psycho-biological and personality constructs, respectively. However, very little work has examined the causal relationship between them, and none has examined the potential mechanisms operating in the relationship. This study aimed to understand whether sleep quality was a cause or an effect of optimism, and whether depressive mood could explain the re...

The classic, well-cited study by Marshall et al. (1992) demonstrated that optimism correlates stronger with extraversion than does pessimism and pessimism correlates stronger with neuroticism than does optimism, and these results lent support to their claim that optimism and pessimism are two separate constructs. However, we argued that their results are likely the outcome of scale artefact cau...

This study aimed to measure the unrealistic optimism of two samples vaccinated and not with Cov-19 virus. The researcher used a (researcher’s construct), where current at existence among an arithmetic mean (94.7347) standard deviation (14.5068) presence unvaccinated (92.7721) (11.80844). Statistically significant differences were also found, results showed statistically between males females, u...

Dispositional optimism is an important product of human evolution. This individual difference variable plays a core role in human experience. Dispositional optimism is beneficial to physical and psychological wellbeing. Previous task-related neuroimaging studies on dispositional optimism were limited by small sample sizes, and did not examine individual differences in dispositional optimism rel...