This is the final exam for The Availability Heuristic. It pulls together the whole course: the precise definition from Kahneman and Tversky and the deeper machinery of attribute substitution, the classic experiments that pinned the bias down (the K-position result, famous names, the felt-ease subtlety), the four engines that crank availability up independent of frequency — vividness, recency, emotion, repetition — how a newsroom doing its job perfectly still hands you an upside-down risk map, how a single repeated story swells into an availability cascade, and how availability is the exact mechanism behind base-rate neglect. Take your time and reason each one through — several look easy until you spot the trap the course named: “vivid means common,” “I saw it on the news so it’s frequent,” “scarier means more likely,” or “I can picture it instantly, so it must happen a lot.”
How this exam works
Read carefully — this exam is final. Each question appears one at a time. Once you submit an answer it is locked for good: there’s no going back, no retry, and no restart. Your score is hidden until the end, where you’ll see a pass/fail verdict. The pass mark is 70%. A few questions ask you to select all correct answers.
Pick the cleanest definition of the availability heuristic.
Select an answer to continue.
Course Recap
Big picture
The availability heuristic, in one picture
- The Availability Heuristic
- What it is
- Judging how likely or frequent something is by how EASILY an example comes to mind — Kahneman & Tversky, early 1970s; ease of recall stands in for real frequency
- The machinery underneath
- Attribute substitution: the mind swaps the hard question ("how frequent?") for the easy one ("how easily recalled?") and never announces the trade — and it runs on felt EASE, not the number of examples (Schwarz: listing 12 feels less assertive than listing 6)
- The classic experiments
- K-position (people say more words START with K; really ~3× have K third), famous-names (the more famous gender feels more numerous), and the felt-ease subtlety
- The four engines
- VIVIDNESS, RECENCY, EMOTION, REPETITION crank availability up independent of frequency — and they STACK (terrorism fires all four). Plane vs. car, sharks vs. heart disease, post-9/11 ~1,500 extra road deaths, insurance bought right after disasters, the identifiable-victim effect
- News inverts the risk map
- Coverage tracks rarity + drama, so it runs INVERSE to frequency — a SELECTION effect, not dishonesty; even perfectly accurate reporting of rare events leaves you miscalibrated, fearing the spectacular and ignoring the mundane
- Cascades & base rates
- An availability CASCADE is a story repeated until it feels true (availability entrepreneurs feed it on purpose); availability is the exact MECHANISM behind base-rate neglect — the vivid case drowns out the boring statistic
- The fix
- You can’t delete it (it fires automatically) — catch it: ask "data or anecdote?", reach for the base rate, discount vividness/recency/emotion/repetition, and beware your own feed
- What it is
Key takeaways
Key takeaways
The availability heuristic is the mind’s habit of judging how likely or frequent something is by how easily an example comes to mind — identified by Kahneman and Tversky in the early 1970s. Underneath it runs attribute substitution: the mind quietly swaps the hard question (“how frequent?”) for the easy one (“how easily recalled?”) and never tells you, and it tracks the felt ease of recall rather than the amount of evidence (the K-position, famous-names, and 12-vs-6 results all show this). Four engines crank availability up independent of real frequency — vividness, recency, emotion, and repetition — and they stack, which is why terrorism, sharks, and plane crashes feel far deadlier than the mundane killers (heart disease, the drive to the airport) that actually get you; the heuristic fears the footage, not the frequency. News inverts your risk map: coverage runs roughly inverse to frequency (a selection effect, not dishonesty), so heavy coverage flags rare events — and even perfect reporting miscalibrates you. Repeated stories swell into availability cascades that sweep whole societies, and availability is the exact mechanism behind base-rate neglect: the vivid case shouts louder than the boring statistic. You can’t switch the heuristic off — it fires before you’re aware — but you can catch it: when a probability feels obvious, ask “am I measuring real frequency, or just how fast an example came to mind?”, reach for the base rate, discount vividness, recency, emotion, and repetition, and stay suspicious of the feed engineered to manufacture availability.