The Availability Heuristic: B2 English Lesson
This B2 English lesson on the availability heuristic explores why the brain judges how common something is by how easily an example comes to mind. Practice gerunds and infinitives after verbs such as remember and imagine and build vocabulary for thinking and bias.
Vocabulary
KEY WORDS
memorable (adjective)
Easy to remember because it is striking or unusual.
Our first camping trip was memorable for its beautiful mountain views.
Synonyms: unforgettable, striking
frequent (adjective)
Happening often or at short intervals.
Frequent bus services connect the village with the nearest town.
Synonyms: common, regular
to overestimate (verb)
To think something is larger, more common, or more likely than it really is.
We tend to overestimate the risk of rare but dramatic events.
Synonyms: to exaggerate, to overstate
dramatic (adjective)
Sudden, intense, and likely to attract strong attention.
The theater used a dramatic flash of light to end the scene.
Synonyms: striking, sensational
to judge (verb)
To form an opinion or estimate about something.
The panel will judge each cake on flavor and appearance.
Synonyms: to assess, to evaluate
salient (adjective)
Standing out and grabbing your attention.
Please summarize the contract’s salient points before we sign it.
Synonyms: prominent, noticeable
probability (noun)
How likely it is that something will happen.
Adding more blue counters increases the probability of drawing one.
Synonyms: likelihood, chance
IDIOMS
to spring to mind (idiom)
To be recalled instantly and without effort.
When you mention Italian food, fresh pasta springs to mind.
Synonyms: to come to mind, to occur immediately
at the top of one’s mind (idiom)
Most easily and immediately remembered.
With the wedding approaching, the guest list was at the top of her mind.
Synonyms: uppermost in one’s thoughts, readily recalled
READ · LISTEN · NOTICE
The Availability Heuristic
Read at your own pace, or play the audio and follow the passage. Listen again without reading for additional practice.
Which is more dangerous: a shark in the ocean or the drive to the beach? Most people feel the shark is the greater threat, even though the car ride is far deadlier. The reason is not bad math. It is that one image is vivid and easy to picture, while the other is dull and forgettable. This quiet mental habit has a name in psychology: the availability heuristic.
What is the availability heuristic?
The availability heuristic is the brain’s habit of judging how common something is by how easily an example comes to mind. The psychologists Amos Tversky and Daniel Kahneman first described this cognitive bias in 1973. Instead of stopping to count real numbers, the mind takes a shortcut: if you can easily remember something happening, you assume it happens often. The shortcut is fast and usually harmless, but it quietly swaps a hard question (“How frequent is this?”) for an easy one (“How quickly does an example spring to mind?”).
Why we overestimate dramatic risks
We overestimate dramatic risks because dramatic events are the most memorable. A plane crash, a shark attack, or a violent crime is salient and frightening, so the news repeats it and the brain stores it. Quiet killers like heart disease or car accidents are far more frequent, yet they rarely make headlines, so few clear images remain. When you try to judge a danger, your mind imagines the easy case, not the common one. People therefore fear flying while happily driving, even though they would never choose to ignore the real numbers if they paused to see them.
How to correct the availability heuristic
You correct the availability heuristic by remembering to ask for the real numbers, not just the vivid story. When a frightening example springs to mind, pause and try imagining the boring statistics behind it. Ask whether the case is truly common or simply memorable. The point is not to stop feeling—fear has its uses—but to notice when a salient image is doing your thinking for you.
So the next time a dramatic story stays at the top of your mind, treat it as a signal, not a verdict. The brain confuses how easily it can recall something with how likely that thing really is. You cannot switch the shortcut off, but you can learn to question it—and a probability you check is far more honest than one you simply feel.
Adapted from Tversky and Kahneman (1973), “Availability: A Heuristic for Judging Frequency and Probability”.
GRAMMAR FOCUS
Gerund vs Infinitive after Verbs
verb + -ing form; verb + to + base verb; remember + -ing form / to + base verb
Some verbs take an -ing form, while others take a to-infinitive. With remember, the -ing form recalls an earlier experience; the to-infinitive refers to an action you need to do.
- Verb + gerund
“I enjoy cooking for friends at the weekend.”
“He avoids reading dramatic headlines before bed.”
- Verb + infinitive
“She decided to check the train times before leaving.”
“We want to learn a few phrases before our trip.”
- Remember: an earlier experience or a duty
“I remember locking the office door before I left.”
“Please remember to lock the office door when you leave.”
Discuss the ideas
Work through the discussion questions on your own, or with a teacher or partner.
- What is a danger you used to fear more than the statistics justified? What changed your mind?
- Why do you think the news shows dramatic events far more often than common ones?
- Can you recall a purchase or decision you made because a vivid example sprang to mind?
- How might the availability heuristic affect what people believe is “normal” online?
- Is it always wrong to trust an example that comes to mind quickly? When might it actually help you?
What this availability heuristic English lesson developed
In this B2 English lesson on the availability heuristic, you learned why easily recalled examples make an event feel more common than it is, built vocabulary for thinking and risk, and used gerunds and infinitives after verbs to say what people avoid, consider, and decide to do.
Read more: The Art of Thinking Clearly by Rolf Dobelli, who walks through the availability heuristic and dozens of other thinking errors in short, clear chapters.
Next lesson: Continue with The Invisible Gorilla to examine how focused attention can hide something in plain sight.
CONTINUE PRACTICING
Continue with the slide collection
Turn this lesson into a class-ready sequence with vocabulary and gerund/infinitive practice, the complete reading and a varied reading check, short listening practice, and seven Listen and Repeat instructions focused on preserving exact wording. Brief teacher notes include timing and objectives.
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