Optimism Bias (Unrealistic Optimism)
People tend to believe that they are less likely than others to experience negative events, such as health problems, and this bias can be influenced by the ease of generating risk-decreasing versus risk-increasing factors.
THE IDEA
Optimism bias is an unjustifiably favorable estimate of one’s prospects, such as believing that a negative event is less likely to happen to oneself than to comparable people. A lower personal risk is not automatically biased; the comparison needs evidence.
The described study asked undergraduates at Rutgers University and Colby College to list factors that increased or decreased their personal risk of serious health problems, such as being 30 lbs overweight or having a drinking problem. The account reports greater comparative optimism after listing risk-decreasing factors and less after listing risk-increasing factors.
The proposed mechanism is that the thoughts brought to mind influence the risk judgment. When reviewing a risk, consider protective factors and vulnerabilities, then compare the impression with relevant evidence rather than assuming that generating more reasons makes the estimate accurate.
When to use it
Health communication: Crafting messages that correct unrealistic optimism about smoking, obesity, or sexually transmitted infections.
Insurance marketing: Emphasizing the true probability of events to encourage adequate coverage.
Personal financial planning: Using lists of potential risks (e.g., job loss, illness) to counteract the bias when creating budgets.
Medical consultations: Helping patients recognize their own risk factors to improve compliance with preventive measures.
FROM THEORY TO EVERYDAY LIFE
In practice
Health Risk Perception
A student believes their risk of developing a drinking problem is much lower than the average college student, even though they drink heavily, because they focus on the fact that they only drink on weekends and don't 'need' alcohol.
Financial Planning
Someone dismisses the possibility of job loss because their own position feels secure, then leaves no room for it in a financial plan. Comparing that impression with information about the job and employer may reveal whether the optimism is warranted.
A MOMENT TO REFLECT
Put it to work.
Think of a recent negative event that happened to someone you know. Did you believe it was less likely to happen to you? Why or why not?
When you consider your own health risks, do you list more factors that reduce your risk or increase it? How might this affect your judgment?
How could understanding optimism bias help you make better decisions in areas like finances or health?
CONTINUE THE CONVERSATION
Source texts
- Heuristics and Biases The Psychology of Intuitive Judgment (Thomas Gilovich, Dale Griffin, Daniel Kahneman)