Intervention Bias
Intervention bias favors doing something without adequately comparing its benefits and harms with those of waiting. Taleb uses it to question action taken mainly because leaving a problem alone feels unacceptable.
THE IDEA
Intervention Bias
Intervention bias is a preference for action that outruns the evidence for its benefit. Assessing an intervention requires considering what it could improve, what harm it could cause, and what may happen without it.
Taleb connects this concern with iatrogenics, or harm caused by medical intervention, and with systems that respond to stress or disturbance. Neither connection makes inaction automatically preferable. The comparison depends on the situation.
His broken-nose anecdote describes questioning advice to apply ice. It illustrates his demand for evidence; the account does not establish a general treatment conclusion. In business or policy, the same question is whether the urge to "do something" is substituting for an assessment of likely consequences.
When to use it
In healthcare, questioning whether a recommended treatment is supported by rigorous trials rather than tradition.
In business, resisting the urge to make sweeping changes during a downturn without data on the root causes.
In a personal decision, compare the likely consequences of acting now, gathering more information, and waiting, including the costs of delay.
In public policy, evaluating whether a new regulation or program has demonstrated benefits that outweigh the risks of unintended consequences.
FROM THEORY TO EVERYDAY LIFE
In practice
Broken Nose in the ER
Taleb recounts being advised to apply ice after breaking his nose and asking what evidence supported the recommendation. The example illustrates scrutiny of an intervention, rather than proof that a particular treatment should always be used or avoided.
Historical Medical Practices
The entry invokes historical bloodletting as a warning that an accepted practice can cause harm. For any proposed intervention, the relevant comparison includes expected benefit, adverse effects, and the consequences of withholding it.
A MOMENT TO REFLECT
Put it to work.
Can you recall a situation where you or someone else took action without evidence, and what were the consequences?
How might natural processes (e.g., healing, learning, adaptation) be undermined by unnecessary intervention?
What criteria can you use to decide whether an intervention is justified or just a response to the bias for action?
Often confused with
CONTINUE THE CONVERSATION
Source texts
- Antifragile (Nassim Nicholas Taleb)