availability bias definition — i counted 7 microwaves

the availability bias, by definition, is what makes you think plane crashes are common because you saw three on the news in a single week. i think parsley is everywhere because i saw it twice in the supermarket aisle. the definition fits perfectly. the parsley, meanwhile, has not stopped following me.

thursday, 1:42pm. the small fluorescent above my desk is buzzing the way it always buzzes after lunch — a private little protest. carla stepped out for a vendor walkthrough, which gives me, on a kind estimate, an hour. sarah, two desks down, just walked past with a kale-something and gave the screen a half-glance.

so. the definition. i typed availability bias definition into the search bar at 1:39pm, sandwich still in mouth-territory. the bar surfaced the cleanest version near the top. i took it. that, already, is the bias. i’ll come back to it.

availability bias definition: availability bias is the mental shortcut where the brain treats the easiest example as the truest one. if a thing comes to mind quickly, the brain quietly votes that the thing is common, important, or correct, even when it is none of those. it operates beneath awareness, in real time.

EASY. EXAMPLE. WINS. EVERY. TIME.

that is the working availability bias definition, scrubbed of academic latin. for the umbrella this fits inside, see the larger pillar on a brain that mostly agrees with itself. this post is the smaller specimen: one named bias, one desk, one man who keeps remembering microwaves when he should be remembering anything else.

availability bias definition, plain

plain version, then. the availability bias definition, in one sentence, is the brain’s preference for whatever example is closest to hand. ease of retrieval is doing the voting. the brain hands you the first example that surfaces and treats it like a representative sample. it is not. it is just the first one. there is a real difference between true and handy, and the brain, on a slow afternoon, treats them as synonyms.

the broader cousin, the working definition for the whole umbrella of mental shortcuts, sets the rule in clinical handwriting. availability is one of the named varieties underneath it. confirmation, the famous one, is on the marquee. availability lives a few doors down, doing more daily work than the marquee gets credit for.

plane crashes feel common because the news repeats them. shark attacks feel imminent because of one summer in 1975. parsley, in my private case, feels ubiquitous because i saw it twice in one supermarket aisle. the brain is voting with whatever happens to be near the door.

the easiest example i had on hand

so when i tried to come up with my own demonstration of availability bias definition in the wild, the first example my brain produced was — and i am not proud of this — the seventh microwave. the microwave is always the example. ask me to illustrate any concept, structural or emotional, and the seventh microwave will arrive within four seconds, slightly singed, holding a fork.

that is the bias, demonstrating itself, in the act of trying to define it. i did not reach for the strongest example. i reached for the one nearest the front of my head. recency is the bias’s favourite drug.

the worst version of holding the term is the one where you nod and assume the bias is a thing other people have. it is not. it was operating on me at 1:41pm, while i typed the term into the same search bar i was about to use to write the article you are now reading. a closed loop with a singed microwave at the bottom.

sarah corrected me, gently, allegedly

sarah, when she came back from the kitchenette, looked at the screen for longer this time. she does not say much in the office. she says things during the running we used to do six summers ago, when she was already explaining her pension to me on mile four. now she’s two desks over, and the conversation has migrated, in fragments, to the spaces between meetings.

“that’s not really the example,” sarah said, pointing at the seventh microwave, with the kale-something held the way the rest of us hold a cup. “the example is supposed to be a thing that looks common because you remember it easily. the microwave is just a thing you remember. it isn’t common in anybody else’s life.”

i told sarah that the microwave was, in my apartment, statistically common, given that i have killed seven of them. sarah said that was a different bias and did not name which one. sarah was gently correct, and i wrote it on a sticky note. it was the kindest version of being told i was wrong, which is, on the whole, the version of correction i am best at receiving.

tom would have the right example, in his volvo

tom, who lives in the suburb with the volvo and the wife and the two children and the pension that pays out in a font that calms him, would have produced the right example without consulting anyone. tom would have said something like “plane crashes feel common because the news amplifies them, and finite attention is the budget the bias works inside.” tom would have said it in his volvo, between exits.

i did not say that. i said the seventh microwave. tom and i were, at university, given the same set of words. tom went home with most of them. i went home with the ones i could throw at a microwave. the third yoga mat is still under the couch from 2023, which tom would call sunk cost, correctly.

for the larger version of why tom and i process these terms differently, see the post about whether the brain can be talked into being more intelligent. short answer: not by seven steps.

why my available examples are mostly microwaves

the honest reading of availability bias definition, applied to my own retrieval system, is that my available examples skew toward whatever has recently broken in my apartment. seventh microwave. third yoga mat. forty-seven tabs, two about the bias and forty-five not. the brain pulls examples from the rooms it has spent time in. my rooms have very few flights and very many appliances.

a man at a podcast i played at speed said environmental context narrows the example set the brain has access to. i did not look it up properly. i looked at one paragraph on a page with a banner ad. that is the bias compounding the bias.

mike, on this question, would have a faster answer. i went to the corner bar last thursday and mike said, between sips, that the brain is a bartender at last call: it serves whatever is closest to the rail. that, in mike’s accounting, is the entire availability bias definition. mike has not filed his taxes since 2019, but on memory retrieval, mike is a sound witness. mike’s gavel is the glass.

verdict, the available answer wins

so the verdict, by my desk, with the fluorescent still buzzing, is that the availability bias definition is honest about its own limit. the bias does not retreat once you know its name. it just gets caught, sometimes, on a sticky note, by a colleague who passed by and pointed at a microwave you should not have been using as the example.

the practical follow-up, see the small workshop on running the brain at a tolerable speed, argues that the only real move is to slow the example down. ask, before you use it, whether the example is common or merely yours. that is the whole tactic. one question, repeated, until the question becomes a habit. the deeper sibling on this, the longer take on what it means to play the fool when nobody is watching, is about the same wiring on a slower clock — the fool, in that essay, is the same brain that picked the microwave today.

there is a film called limitless, in which a man takes a tablet and stops being subject to most of these problems. on this desk, on this afternoon, there is no tablet. there is a sticky note with sarah’s correction on it, a kale-something half-finished two desks over, and a search bar that has, for one afternoon, behaved itself.

carla slack-pinged from the walkthrough. the vendor is running long. she is, in her phrase, “hostage to a slide deck.” i told her i would hold the fort. i meant the desk. she meant the deck.

the seventh microwave, two miles away, is on its first month. the third yoga mat is under the couch. sarah’s sticky note is on the second monitor and will stay there until someone peels it off. i did not move it. moving it would be retrieving a different example.

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