"What if …": why the brain would rather predict a hundred disasters than one calm day

Your child doesn’t pick up the phone. Within three seconds your mind is already at A&E. Your boss writes “can we talk tomorrow?” — and by the evening you have, in your head, lost your job, your flat and your future. One single neutral event, and a whole chain: what if, what if, what if.

Psychology calls this pattern of thinking catastrophising — automatically predicting the worst possible outcome and experiencing that outcome as though it were almost real. And before you scold yourself for it: you don’t do this because you are gloomy or weak. You do it because your brain is exactly as evolution carved it — a machine for predicting danger that would rather shout “fire!” a hundred times unnecessarily than miss a real one once.

In this piece I explain why bad scenarios have priority over good ones in the mind, how the what-if chain forms at all, what really drives it — and at which three points you can cut it. If you’re interested in the wider picture of how thoughts and anxiety dance together, you’ll find it in my piece on anxious thoughts; here the two of us go deep into a single mechanism.

Bad is stronger than good — by design

Let’s start with the foundation. In 2001 Roy Baumeister and colleagues published a review article with a telling title: Bad is stronger than good. In it he gathered evidence from almost every area of psychology: bad events affect mood more strongly and for longer than equally large good ones, criticism hurts more than praise pleases, losing a hundred euros hurts more than finding a hundred euros delights, and bad first impressions are harder to repair than good ones are to spoil. The negative has systematic priority in our mental system — not as a fault but as a setting.

Why? Because through evolution the cost of the two errors was unequal. An ancestor who mistook a rustle in the grass for a snake a hundred times unnecessarily lost a few calm moments. An ancestor who mistook a real snake for a rustle once lost everything. Natural selection therefore rewarded nervous systems tuned to “better a false alarm than a missed danger”. Your catastrophising is the inheritance of that arithmetic: the brain isn’t looking for truth, it is looking for survival. The only problem is that the same system, calibrated for snakes, is now processing emails, test results and the silence on the other end of the phone.

The anatomy of the chain: how a spark becomes a fire

Catastrophising almost never jumps straight to the end. It works as a chain in which each individual link looks almost reasonable: “What if this pain in my chest is something serious?” → “What if it’s my heart?” → “What if I need surgery?” → “What if I don’t survive — what will happen to the children?” Each step adds only a little, but after four steps you have gone from a twinge under the ribs to orphaned children. And the body — this is the crucial part — doesn’t respond to the first link but to the last: your heart pounds and your breathing goes shallow, as though the catastrophe were already here. I describe why the brain’s alarm doesn’t distinguish imagination from reality more precisely in my piece on anxiety in the brain.

Here, though, the research reveals something surprising. Thomas Borkovec, one of the pioneers of worry research, showed with colleagues that anxious chaining of thoughts is predominantly verbal — people who worry narrate to themselves in their heads, and see far fewer vivid images of the frightening outcome. And in his theory that is precisely where the “reward” of worry hides: verbally listing catastrophes is emotionally less intense than vivid imagery, so in the short term worry acts as a buffer — as avoidance of the full emotional experience of fear. The bill comes later: because the fear is never really experienced, it is also never processed and never fades. Worry is therefore a kind of pact with the devil — a little less terror now, in exchange for an endless continuation. Add to that a superstitious reinforcement: almost nothing that worries predict actually happens, and the brain concludes “I worried and it didn’t happen — clearly worrying works”.

The core beneath the chain: uncertainty you can’t bear

If you unwind the what-if chain all the way back, at the bottom you almost always find the same thing: not fear of a particular outcome, but the inability to bear not knowing. The Canadian researcher Michel Dugas and colleagues (1998) proposed a model in which intolerance of uncertainty is precisely the central engine of chronic worry: people who experience uncertainty as unacceptable, unfair and dangerous respond to it with chained prediction — as though uncertainty could be erased by thinking through every possible outcome in advance. Research from his group consistently shows that intolerance of uncertainty is more closely linked to worry than the sheer quantity of stressors, and that as intolerance falls, so does worry.

This turns the goal of working with catastrophising on its head. The goal isn’t to reach certainty — there is no such thing; nobody can sign a guarantee that your child will be fine and your job will stay. The goal is to raise your capacity to carry uncertainty: the ability to say “I don’t know — and tonight I can live with not knowing”. That is a muscle, not an insight. It grows with practice, every time you don’t run the chain to the end but cut it and stay in a not-knowing that is uncomfortable but bearable.

The brain as a prediction machine

Modern neuroscience offers one more illuminating framework. According to the theory of predictive processing — set out accessibly by the philosopher of cognitive science Andy Clark (2013) — the brain is not a passive receiver of the world but a machine that continually predicts the world and merely corrects its predictions with incoming data. Most of what you experience is in fact your brain’s predictions, not raw reality. And in an anxious mind this machine drifts: a review by Grupe and Nitschke (2013) describes how anxiety systematically distorts exactly these predictive processes — overestimating the likelihood of bad outcomes, overestimating their cost, underestimating your own ability to cope, and over-responding to uncertainty itself.

Why does this matter to you? Because it means a catastrophic thought isn’t a report but a draft forecast — and a draft can be edited. A weather forecast is not the weather. And just as a forecaster calibrates their models against data, you can calibrate yours: by asking how often your mind’s catastrophic predictions have actually come true so far. For most people the hit rate is so close to zero that any forecaster with that record would have been sacked long ago — and yet we still take their bulletins deadly seriously.

Why reassurance doesn’t help (and even harms)

Before we get to the tools that work, a word about the most common one that doesn’t: seeking reassurance. “It’ll be fine, won’t it? Tell me it’ll be fine.” Your partner confirms it, your mother confirms it, the doctor confirms it, three online forums confirm it. For a few minutes there is relief — and then the chain starts up again, often stronger: “But what if they just told me what I wanted to hear?”

The mechanism is the same as with every form of avoidance: short-term relief, long-term reinforcement. Every time anxiety is soothed by an external source, the brain learns two things — first, that the threat must have been serious (otherwise you wouldn’t have needed reassuring), and second, that you can’t bear uncertainty on your own (otherwise you wouldn’t have called). Intolerance of uncertainty, the engine of the whole chain, is not reduced by this but fed. That is why modern approaches to treating chronic worry treat reassurance-seeking like any other safety habit: as a behaviour to be gradually dropped, not perfected.

This doesn’t mean you shouldn’t talk about your worries with the people close to you — it only means that the difference between a conversation and a reassurance loop is the same as the difference between solving and brooding: a conversation leads somewhere, a loop turns. If you ask your partner the same question every evening, you can instead tell them what is going on inside you (“the what-ifs have got me again, just so you know”) and ask for what genuinely helps: closeness, not a certificate of a safe future. I describe a similar loop, only a solitary one, in my piece on rumination — there the mind soothes itself by chewing over the past, here by checking the future, but the fuel is the same.

Decatastrophising: three pairs of scissors for the chain

Cognitive therapy has developed a procedure for working with catastrophising called decatastrophising. It is not consolation (“everything will be fine” — you don’t know that), nor positive thinking, but three sober questions that cut the chain at three different points:

• The likelihood scissors: how likely is this really? Not “is it possible” — almost anything is possible — but: if you were betting your own money on it, how much would you stake? How many times has the worst actually happened in similar situations so far? What would a good friend say, one who isn’t emotionally involved?
• The capability scissors: what would I do if it really happened? This question is surprisingly calming, because it takes the chain to the end — but with you in the leading role, not as a victim. If you really did lose your job: what would you do in the first week? Who would you call? A catastrophe that gets a plan is no longer a catastrophe — it is a scenario.
• The present-moment scissors: what is happening right now, this minute? The chain lives exclusively in the future. At this moment you are sitting on a chair, breathing, and your child is most likely riding home on a crowded bus with a dead phone. Returning to the present through the senses — what I see, hear, feel under my fingers — takes away the only fuel the chain has: time that doesn’t yet exist.

An exercise: best, worst, most likely

Finally, a simple written exercise that brings all three together. When the what-ifs grab you, take a sheet of paper and write down three scenarios: the worst possible outcome (allow yourself to write it out to the end — on paper it loses part of its power), the best possible outcome (yes, that is “possible” too, by the same logic as the catastrophe) and the most likely outcome — soberly, as if you were assessing it for someone else. Then write a single sentence: what can I do today that increases the chance of a good outcome or prepares me for a bad one. And then — this is the hardest part — leave the topic. If it comes back, it doesn’t need a new analysis; it needs an appointment, and I write about how to give worry an appointment in the worry postponement exercise.

The exercise works because it gives the brain what it is looking for with the what-if chain — a sense of preparedness — without the endless loop. The worst-case scenario is thought through once, thoroughly and with an ending, instead of a hundred times, superficially and with no end.

One tip from practice: do the exercise on paper, not in your head. In your head the worst-case scenario will eat all your attention and the “most likely” one will never get its turn; on paper all three get equal space. And if you do the exercise for a few weeks, keep the sheets — in a month’s time they will be your personal collection of evidence about how your mind’s forecasts actually turned out. Few things convince an anxious mind as thoroughly as its own statistics of missed predictions, written in black and white.

When the chain becomes a way of life

In the therapy room, a story often emerges behind chronic catastrophising: growing up alongside an unpredictable parent, where storms had to be sensed in advance; an experience when something bad really did arrive “out of nowhere”; a family in which worry was the only language of love (“your mother worries because she loves you”). For someone like that, predicting the worst isn’t a habit but a former life function — a guard who was once essential and whom nobody ever dismissed. That is why working with catastrophising is never only about techniques; it is also about the question of when your guard was hired and what they need in order to lay the job down. If you recognise yourself in this — especially if the chain likes to start up at night, which I write about in my piece on overthinking before sleep — the two of us can look at that story together; write to me through the contact page.

And until then, the next time the phone rings at an unusual hour: before your mind fires off the first what-if, try a single breath and a sentence: “This is a forecast, not a report.” Your brain is a good soldier of bad arithmetic. You don’t have to take it at its word.