A 2017 survey of adults across Great Britain found that "better sleep is the biggest single contributor to living better," and the difference between people who feel rested "some of the time" and those who feel "well-rested" exceeds "the benefits of quintupling someone's disposable income." Some of the other factors that are associated with people's self-assessments of how well they live include their sex life, job security, having a child at home, spending time outside, and "sitting down to eat a meal with friends and family without the television turned on." Some of the factors that showed no association include home ownership and leisure time. As with most social science studies, these results "are associative, not necessarily causal."