Do optimists really live longer?

A number of studies have shown that optimists enjoy higher levels of well-being, better sleep, lower stress and even better cardiovascular health and immune function. And now, a study links being an optimist to a longer life. What makes these findings especially impressive is that the results remained even after accounting for other factors known to predict a long life.

Optimism is typically viewed by researchers as a relatively stable personality trait that is determined by both genetic and early childhood influences (such as having a secure and warm relationship with your parents or caregivers). But if you’re not naturally prone to seeing the glass as half full, there are some ways you can increase your capacity to be optimistic. 

For example, visualising and then writing about your “best possible self” (a future version of yourself who has accomplished your goals) is a technique that studies have found can significantly increase optimism, at least temporarily. But for best results, the goals need to be both positive and reasonable, rather than just wishful thinking. Similarly, simply thinking about positive future events can also be effective for boosting optimism. 

Fuschia Sirois writing in The Conversation

Optimists live longer

Here’s a good reason to turn that frown upside down: Optimistic people live as much as 15% longer than pessimists, according to a new study spanning thousands of people and 3 decades.  After controlling for health conditions, behaviors like diet and exercise, and other demographic information, the scientists were able to show that the most optimistic women (top 25%) lived an average of 14.9% longer than their more pessimistic peers. For the men the results were a bit less dramatic: The most optimistic of the bunch lived 10.9% longer than their peers, on average, the team reports today in the Proceedings of the National Academy of Sciences. 

David Shultz writing in Science Magazine 

Getting closer to the truth

Most of us view the world as more benign than it really is, our own attributes as more favorable than they truly are, and the goals we adopt as more achievable than they are likely to be. We also tend to exaggerate our ability to forecast the future, which fosters optimistic overconfidence. In terms of its consequences for decisions, the optimistic bias may well be the most significant of the cognitive biases. Because optimistic bias can be both a blessing and a risk, you should be both happy and wary if you are temperamentally optimistic.

Optimism is normal, but some fortunate people are more optimistic than the rest of us. If you are genetically endowed with an optimistic bias, you hardly need to be told that you are a lucky person -- you already feel fortunate.

An optimistic attitude is largely inherited, and it is part of a general disposition for well-being, which may also include a preference for seeing the bright side of everything. If you were allowed one wish for your child, seriously consider wishing him or her optimism. Optimists are normally cheerful and happy, and therefore popular; they are resilient in adapting to failures and hardships, their chances of clinical depression are reduced, their immune system is stronger, they take better care of their health, they feel healthier than others and are in fact likely to live longer.

Of course, the blessings of optimism are offered only to individuals who are only mildly biased and who are able to “accentuate the positive” without losing track of reality.

Optimistic people play a disproportionate role in shaping our lives. Their decisions make a difference; they are inventors, entrepreneurs, political and military leaders -- not average people. They got to where they are by seeking challenges and taking risks. They are talented and they have been lucky, almost certainly luckier than they acknowledge. Their self-confidence is reinforced by the admiration of others. This reasoning leads to a hypothesis: the people who have the greatest influence on the lives of others are likely to be optimistic and overconfident, and to take more risks than they realize.

Daniel Kahneman, Thinking, Fast and Slow