Risk Compensation Bias (Peltzman Effect)
Risk compensation describes taking more risks when protection makes a situation feel safer. Such behavior may offset some intended safety benefits; it does not establish that every protective measure is ineffective.
THE IDEA
Risk Compensation Bias
"Can you please drive a little slower?" "I installed new seat belts and airbags last week. You don't have to worry about anything!"
The risk compensation bias comes from our tendency to adjust our behavior based on the level of perceived risk. We tend to take more risks when we feel protected and safe. The term 'Peltzman effect' is named after Sam Peltzman’s study (1975) of automobile safety regulation. The concern is that behavioral changes can offset some of a protective measure’s benefits. Similar questions arise when evaluating protective equipment in contact sports.
From a more psychological point of view, Gerald J S Wilde explains this behavior through his theory of 'risk homeostasis'. The theory proposes that people have a 'target level of risk' around which they adjust their behavior. If the perceived risk in a situation is higher than this level we act to reduce it, and if it is lower we engage in dangerous activities to get back to our target level.
When using a protective measure, check whether feeling safer has changed your behavior. Evaluate the protection together with that change rather than assuming either complete safety or complete cancellation of its benefits.
When to use it
When implementing new safety measures at work, consider how employees might adjust their behavior and offset the intended safety gains.
In public health campaigns, be aware that promoting safety can lead to riskier behavior; design messages that address this bias.
When using personal safety equipment like helmets or seat belts, consciously remind yourself to maintain safe practices.
In financial investing, recognize that insurance or safety nets might encourage riskier investments; balance risk and safety carefully.
FROM THEORY TO EVERYDAY LIFE
In practice
Road Safety Interventions
A driver may become less cautious after installing safety equipment. The question associated with Peltzman’s 1975 study is whether such behavioral changes offset benefits of automobile safety regulation, and by how much.
Contact Sports and Protective Gear
A player feels better protected by equipment and becomes more willing to make risky contact. Evaluating the equipment’s overall effect requires considering that behavior alongside the protection it provides.
A MOMENT TO REFLECT
Put it to work.
Can you think of a situation where you took more risks because you felt protected? How did that turn out?
How might risk compensation affect the effectiveness of safety regulations in sports or transportation?
What steps can you take to avoid the risk compensation bias in your daily decision-making?
References
- The Effects of Automobile Safety Regulation — Sam Peltzman (1975)
- Risk Homeostasis Theory — Gerald J.S. Wilde
CONTINUE THE CONVERSATION
Source texts
- The 25 Cognitive Biases Uncovering The Myth Of Rational Thinking (Charles Holm)