Watch for
Rationalising away warnings with "it will probably be fine."
Belief & ConfidenceBias #108
Normalcy Bias
We assume things will continue as normal even as disaster looms.
The tendency to underestimate the likelihood or impact of a potential disaster based on the assumption that things will continue as they normally do.
Why it matters: Explains why people fail to evacuate before natural disasters and why organisations miss early warning signals.
Try this
Treat disaster warnings seriously and pre-commit to action thresholds.
Real-world example
Residents ignoring evacuation orders before a hurricane because previous warnings were false alarms.
Key researchers
Amos Tversky
First described in 1979
Psychological mechanism
Anxiety regulation through denial. Accepting an imminent disaster creates acute anxiety. The brain reduces this anxiety by defaulting to the normalcy assumption that past patterns will continue.
Seminal research
Discussed in Kahneman and Tversky (1979) on the planning fallacy and normalcy bias in decision-making.
Related Biases
Debrief
Biases are not character flaws. They are recurring patterns in how minds compress uncertainty, save energy, and narrate reality. Once you recognise the pattern, you can slow the decision down, test the assumption, and make space for a better explanation.