Recognizable questions
- Why do I suddenly think something happens often after just one shocking news report?
- Why do striking stories stick in my mind more than statistics?
- Why does something feel more likely when I know several examples of it?
- Why can stories I hear often shape my view of reality?
- Why do recent or emotional events make such a strong impression?
- Can a true story still give a distorted picture of how often something happens?
- How can this work within religious and former religious groups alike?
- How can I assess probabilities and risks more realistically?
What is the availability heuristic?
The availability heuristic is a mental shortcut in which we partly judge how common or likely something is based on how easily examples of it come to mind. Psychologists Amos Tversky and Daniel Kahneman described this mechanism in 1973.
Our brain can, as it were, think: ‘I can think of a few examples right away, so it must happen often.’ That is not necessarily irrational. Things that really do happen often are usually also stored more readily in our memory. But frequency is not the only thing that determines what is easy to recall. Recency, emotion, shocking events, repetition, and vivid personal stories also make information more accessible. As a result, something can feel frequent without actually being frequent. Stuck markdown
A simple example
Suppose you see extensive news coverage of a serious plane crash. You see images, read personal stories, and hear people talking about it. When you have to fly shortly afterward, the risk may suddenly feel greater.
That does not mean flying has objectively become more dangerous. At that moment, a plane crash is simply very easily available in your memory.
Risks that barely get any coverage may be statistically more important but feel less dangerous, precisely because no vivid example immediately comes to mind. Stuck markdown
Why does our brain use such shortcuts?
We cannot first gather all available statistics every time we make a decision. That is why our brain uses quick strategies — heuristics — to make estimates with limited time and information.
That is often useful. If you have nearly been hit by a car three times at the same intersection, it is practical that those experiences immediately come to mind when you bike there again.
However, the same strategy can mislead us when the examples that are easy to recall are not representative.
That is why there is a difference between: ‘This example comes to mind easily’ and ‘So this must happen often.’
Recent events often feel more important
Recency plays a major role. After a burglary in the neighborhood, the chance of burglary can suddenly feel much higher. After hearing about a rare side effect, that side effect may seem more likely. After several stories about divorces, you may get the feeling that relationships almost always fail.
The opposite can happen too. When you mostly hear success stories, a certain choice can seem easier or more successful than it is on average.
Our memory does not return a random sample of reality. It mostly returns what stood out and stuck.
Emotional stories have extra influence
A statistic like ‘this happens in a small percentage of people’ is abstract. A personal story has a face, emotions, and details.
That makes personal stories valuable. They can make clear what an event means for a human being.
But a story does not automatically tell you how often something happens.
That is why two kinds of information may be needed side by side: a personal story shows what is possible; broader data help assess how common it is.
How does this work within groups?
Every community tells stories. Families do, companies, political movements, religions, and groups of former members do as well.
Stories can convey values, warn, inspire, and connect people. When certain kinds of experiences are told more often, those examples become more readily available in memory.
That does not automatically mean someone is consciously trying to influence others. It is a normal result of how memory works.
A useful question is therefore: ‘How representative are the stories I hear often?’
How can this be recognizable among Jehovah’s Witnesses?
Jehovah’s Witnesses publish many personal experiences and life stories. In their material, there are, for example, compilations about people whose lives changed through Bible study, spiritual goals, setbacks, and faithfulness under difficult circumstances. Such stories are used, among other things, to encourage readers and strengthen their faith.
That is not, in itself, a logical fallacy. A personal experience can be true, inspiring, and informative.
From the perspective of the availability heuristic, you can add an extra question: ‘Does this experience tell me what is possible, or also how often this happens on average?’
An experience in which someone, after making a certain choice, has a particularly positive outcome shows that such an outcome can happen. It does not automatically tell you how many people made the same choice and had a different outcome.
The same applies to former Jehovah’s Witnesses
The availability heuristic does not operate only within a religious community.
When a website, forum, or support group mainly shares intense negative experiences, those examples can become especially easy to recall.
As a result, someone may unintentionally start thinking that virtually every Jehovah’s Witness has had exactly the same experience.
That too does not have to be representative.
The availability heuristic works on all sides.
A story can be true and still not be representative
This distinction is important.
When it comes to an experience, you can ask two different questions: ‘Is this story true?’ and ‘How often does this happen?’
A completely true story can be exceptional.
Suppose someone says: ‘My neighbor smoked all his life and lived to be 95.’ That may be true. But from that one experience, you cannot conclude that smoking is harmless on average.
Conversely, one serious illness story does not automatically tell you how large a certain risk is on average.
To answer the question how often something happens, you need broader data.
Repetition makes information more accessible
When the same kind of story comes up often, it becomes easier to retrieve from memory.
That does not necessarily mean that someone will see the story as true only because of repetition. The first step is simpler:
it comes to mind more easily.
That very accessibility can then influence how often or how likely we think something is.
That is why repetition can have psychological influence without there having to be conscious manipulation.
The availability heuristic is not the same as confirmation bias
These two mechanisms can work together, but they are not the same.
With the availability heuristic, the key question is: ‘Which examples come to mind easily?’
With confirmation bias, the core question is: ‘Which information do I notice, seek out, or remember more easily because it fits what I already believe?’
Suppose you think a certain city is dangerous. After a number of striking news reports about violence, those events come to mind immediately. That is availability.
If after that you mainly remember reports that confirm your belief and pay less attention to information that conflicts with it, confirmation bias may be at play.
From possibility to probability
A common mental leap is from:
‘This happened’
to:
‘So this happens often.’
But that conclusion does not follow automatically.
A personal example can show that something is possible. To determine whether it is likely, you need more information.
A useful question is therefore:
‘Is this one striking example or a representative pattern?’
Look at the denominator
A simple way to think more realistically is to ask:
‘Out of how many?’
Suppose you hear: ‘Ten people got this side effect.’ That may sound concerning.
But the picture changes if it is 10 out of 20 people or 10 out of 2 million people.
So the striking number alone is not enough. You also need the denominator.
This ties in with a related problem: ignoring base rates, the overall frequency with which something occurs.
How can you assess things more realistically?
You do not have to distrust personal stories. They contain information that statistics sometimes do not provide.
Just add a few extra questions: How often does this really happen? Are there broader figures? Which cases am I not hearing about? Are both success and failure visible? Is this example representative? Does it come to mind mainly because it is recent, emotional, or often repeated?
A useful reminder is:
‘The fact that I can easily think of an example does not yet say how likely it is.’
Questions to think about
What stories come immediately to mind when I think about this topic?
Why these examples in particular?
Are they recent, emotional, shocking, or repeated often?
Do I know how often this really occurs?
Which examples do I almost never hear about?
Have I looked mainly at personal stories, or also at broader data?
Are both positive and negative outcomes visible?
Would my estimate change if I heard other examples more often?
Do I know the denominator: how many people or situations are we actually talking about?
Do I distinguish between ‘this can happen’ and ‘this is likely to happen’?
Summary
The availability heuristic is a normal mental rule of thumb in which we base judgments partly on how easily examples come to mind.
This often works well, but striking, recent, emotional, and repeated events are easier to remember. As a result, they can seem more frequent or more likely than they really are.
A personal story does not have to be untrue in order to give a distorted picture of frequency.
This applies within religious communities, former religious communities, news media, and everyday life.
The key question is:
‘Do I think this happens often because I have good data — or because I can easily think of examples?’
Stories show what can happen. To know how often it happens, more information is usually needed.
Sources and further reading
Amos Tversky & Daniel Kahneman – Availability: A heuristic for judging frequency and probability, 1973, Cognitive Psychology 5(2), 207–232. The original scientific article in which the availability heuristic was systematically described.
American Psychological Association – APA Dictionary of Psychology: Availability heuristic. On how easily remembered information can influence judgments of likelihood.
Jehovah’s Witnesses – Experiences of Jehovah’s Witnesses. An official collection of personal experiences about faith, spiritual goals, setbacks, and loyalty, among other things; used here as an example of the role of personal experiences.
Jehovah’s Witnesses – Life Stories of Jehovah’s Witnesses. Personal life stories that, according to the organization, can encourage readers and strengthen their faith.
Also read
Confirmation bias – Why do we often notice and remember information that fits what we already believe more easily?
Base-rate neglect – Why can a striking example make us lose sight of the overall frequency?
