← Giant Brain Candy
Giant Brain Candy: Built Like a Smoke Alarm. When a false alarm is cheap and a missed fire is deadly, a well-designed alarm gives many false alarms. Psychiatrist Randolph Nesse argues our fear and anxiety are built the same way. Source: The smoke-detector principle.
A working modelThe research
  1. Nesse, R. M. (2019). Good reasons for bad feelings: Insights from the frontier of evolutionary psychiatry. Dutton.

Journey 7 · Uncertainty

Built Like a Smoke Alarm

When a false alarm is cheap and a missed fire is deadly, a well-designed alarm gives many false alarms. Psychiatrist Randolph Nesse argues our fear and anxiety are built the same way.

Source: The smoke-detector principle · A working model

Share this card

Instagram or TikTok: download the picture and post it.

30 days of All-Access, free — every journey and every feature. No card.

Start free — 30 days of All-Access

More from Uncertainty

Giant Brain Candy: A Maybe Can Hurt More. People learning when painful shocks might come felt and showed the most stress when a shock was a 50/50 toss-up, not when it was certain to come. Source: Uncertainty and stress.
Giant Brain Candy: The Worries That Never Came. People treated for chronic worry logged their worries for ten days and checked back 20 days later: 91.4% of the worries had not come true. Source: How often worries come true.
Giant Brain Candy: Check Again, Trust Less. People who checked a virtual gas stove again and again grew less sure they had checked it, as their memories grew less vivid, though their memory stayed just as accurate. Source: Repeated checking and memory.
All of Uncertainty’s Brain Candy, and every other journey’s →