There is a particular sort of reassurance that arrives after a worry has been written down: it looks smaller, briefly, on the page. That does not make the feared outcome less possible, and it does not make anxiety a problem of poor note-taking. But recording a prediction and later checking what actually happened is a recognisable cognitive-behavioural skill. Early evidence suggests it may loosen worry’s grip for some people with generalised anxiety disorder; it is not a replacement for assessment or treatment.
Why worry feels useful in the moment
Worry is future-facing thought: a mental rehearsal of what might go wrong and how one might prevent it. It can feel like preparation. If a meeting, symptom or family problem is uncertain, repeatedly turning it over may seem more responsible than putting it aside.
For people with generalised anxiety disorder (GAD), however, worry can become frequent, difficult to control and costly. The NHS overview of GAD describes worry that affects everyday life alongside symptoms such as restlessness, poor concentration, tension and disturbed sleep. Diagnosis is not something a diary can make: duration, distress, physical health, medicines and other mental-health symptoms all matter.
A useful distinction is between problem-solving and worry. Problem-solving names a specific, actionable question: “Which bill must I pay first?” Worry often asks an unanswerable one: “What if everything goes wrong?” The first can produce a next step. The second can produce another hour of thought.
What “worry outcome monitoring” means
Outcome monitoring is deliberately plain. When a worry appears, write a short prediction, rate how likely or bad it feels, and later record the outcome. The aim is not to force a positive thought or to prove that nothing bad ever happens. It is to collect information about a prediction that anxiety has presented as certain.
For example: “If I make a mistake in the presentation, my manager will think I am incompetent.” A later entry might note that one figure needed correcting, the meeting continued and no such judgement was expressed. The record does not settle every fear. It gives the mind a competing data point: feared outcomes, outcomes that did happen but were manageable, and outcomes that never arrived are not the same category.
This resembles a behavioural experiment, a structured CBT exercise in which a person tests a prediction rather than merely debating it. In a 2022 randomised clinical trial in Behavior Therapy, a focused treatment using behavioural experiments for intolerance of uncertainty outperformed a waiting-list control in adults with GAD. That was a 12-week clinical treatment, not a stand-alone notebook exercise, so its results should not be inflated into a claim that self-tracking treats GAD.
What the latest trial found
A 2026 randomised trial in the Journal of Anxiety Disorders compared a ten-day smartphone worry-outcome-monitoring intervention with active thought recording in 117 people with GAD. Participants using the outcome-monitoring approach had larger reductions in worry and several related measures during the study period.
That result is encouraging, but narrow. The comparison was not “tracking versus no attention at all”; the control group also recorded thoughts. The intervention lasted only ten days, used prompts several times a day and studied people already diagnosed with GAD. It cannot tell us whether a paper diary works equally well, whether gains persist, or which people find the exercise unhelpful.
The trial’s most human finding may be its least surprising: many feared outcomes did not occur, and when they did, participants often coped better than they predicted. That is a reason to be curious about one’s forecasts, not a reason to dismiss risks or instruct oneself to “just stop worrying”.
Why the method may help
Worry thrives on a one-sided record. Vivid possible disasters are repeatedly rehearsed; ordinary outcomes are quickly forgotten. A written check-back changes the timing. It asks the person to return after the anticipated event, when the nervous system is less occupied with anticipation.
There is a second mechanism: specificity. “I am worried about work” is hard to test. “I predict that asking for a deadline clarification will make me look incapable” can be tested by asking, then observing the response. This does not guarantee comfort. It creates a smaller, observable question.
Research on repetitive negative thinking also supports treating worry as a process rather than an oracle. In a 2024 randomised trial of a self-help programme for young adults, an intervention designed to target worry and rumination reduced both relative to a waiting list over six weeks. It does not establish that every app or journal will work, but it supports the broader idea that the pattern of repetitive thought is a worthwhile target.
How to try it without turning it into another task
Keep the exercise bounded. A long catalogue of fears can become another form of rehearsal. One or two entries, made after a clearly stressful moment, are enough to see whether the practice is useful.
A simple entry has four parts: the situation; the precise feared outcome; a 0–100 estimate of how likely it feels; and, after the event, what happened and what you did to cope. If the event is distant, choose a date to review the entry rather than checking it repeatedly.
Use concrete language. “I will not cope” is important emotionally but difficult to evaluate. “I will be unable to complete Tuesday’s appointment if I sleep badly on Monday” is more useful because it leaves room to notice partial outcomes and coping. And include the coping response. Anxiety often predicts not only catastrophe but helplessness.
What this means in practice
- Choose one recurring, everyday worry rather than every thought that passes through your mind.
- Write the feared outcome in one sentence, then rate how likely it feels before the relevant event.
- Set a specific review point—after the meeting, phone call or appointment—rather than revisiting the entry all day.
- Record both what happened and what you did that helped, even if the outcome was imperfect.
- After several entries, look for patterns; do not calculate a personal “risk score” from a handful of examples.
When to leave self-help behind
Self-guided strategies are best suited to ordinary stress and as a complement to professional care. Seek support from a GP or mental-health professional if worry is persistent, escalating, interfering with work, relationships or sleep, or accompanied by panic, low mood, substance use or thoughts of self-harm. The NHS guidance on GAD treatment sets out evidence-based options, including talking therapies and, in some circumstances, medicines.
If an entry prompts a strong urge to avoid, check, seek reassurance or revisit a traumatic event, stop the exercise and discuss it with a clinician. Exposure-based and trauma-focused work is safest when it is tailored; a notebook is not a substitute for that structure.
What we don’t know
The evidence for outcome monitoring is still early. The latest trial was brief, app-based and conducted in a clinical group, so it does not establish long-term benefit, the best frequency or whether the technique helps outside GAD. Self-report outcomes can also be influenced by expectation and the attention paid to the task.
There is another limit that matters: accurate concern exists. Worry about an unsafe relationship, unpaid rent or a new severe symptom may contain a practical problem, not merely a distorted forecast. The useful question is whether an action is available now. When it is, take the action; when it is not, monitoring a prediction may be more constructive than endlessly rehearsing it.
A worry record cannot promise calm. It can, at its best, make room between a prediction and a verdict—and that small gap is often where a more useful next step begins.
Photo: Tim Wildsmith on Unsplash