Brain break · Time reproduction

How Long Was That?

A bar fills. You guess how long it lasted by making it happen again. Most people are consistently short — and that’s the mechanism behind ‘five more minutes’.

Before you start

Watch the bar, guess the seconds, then hold to reproduce the same length.

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About How Long Was That?

How Long Was That? is a time reproduction task. A bar fills for an interval you are not told the length of, and then you try to make the same amount of time pass again by tapping start and stop. Do it a few rounds and a pattern usually shows up: most people are consistently short, consistently long, or all over the place.

This is the break we most wanted to build, because time blindness is the ADHD experience people describe most and get the least help with. It is also the one where the evidence is genuinely solid. A meta-analysis of 55 studies across four different timing paradigms found consistent deficits in ADHD in every one of them — time discrimination, estimation, production and reproduction, with medium effect sizes in the two largest. Difficulty judging time is not a character flaw you invented. It is measurable, and it has been measured a lot.

What that research does not say is that you can fix it with a browser game, and we are not going to pretend otherwise. Knowing which direction you drift is useful. Practising this task until you get good at it will make you good at this task.

Still, the direction is the interesting bit. If your reproductions come out short, time felt like it was moving faster than the clock — which is the classic ADHD direction and the mechanism underneath ‘five more minutes’ turning into forty. If they come out long, you were probably counting, which is a strategy rather than a feel.

We deliberately do not tell you the target between rounds. If you knew it was 5.2 seconds, round two would become arithmetic instead of a judgement, and the whole thing would stop measuring anything.

If the result lands hard, the practical follow-ups are the ones that put time outside your head rather than inside it: visible timers, alarms set for the start of things rather than the end, and the free Stuck Reset when the clock has already got away from you.

How it works

  1. 1Watch the bar. It fills over an interval between about four and nine seconds. Don't count — the point is to feel the length, not measure it.
  2. 2Reproduce it. Tap Start, then tap Stop when you think the same amount of time has passed.
  3. 3Do it a few times. Two, three or five rounds, each with a different interval, so a direction can actually show up.
  4. 4See both bars. Your results show the real interval and your version of it side by side for every round, with the percentage you were off by.

Time blindness — questions people ask

What is time blindness in ADHD?
It is the everyday name for difficulty perceiving, estimating and tracking the passage of time — losing an hour to a five-minute task, or being unable to feel how long something will take. A meta-analysis of 55 studies found people with ADHD show consistent differences across all four standard timing paradigms compared with controls.
Is this a time blindness test?
No. It is a short exercise that shows which direction you drift on one particular timing task, on one particular day. It cannot diagnose anything, and a single run tells you very little on its own.
What does it mean if my times are too short?
That you made the intervals shorter than they really were, which means the time felt like it was passing faster than the clock. That is the more common direction, and it is the mechanism behind underestimating how long things take.
What does it mean if my times are too long?
That you stretched the intervals. This often means you were counting deliberately rather than judging by feel, which is a reasonable strategy — it just measures something different.
Can practising this fix my time blindness?
There is no evidence that it can. Repeating a timing task makes you better at that timing task. The genuinely useful strategies put time outside your head — visible clocks and timers, alarms for when to start rather than when to finish, and building in far more buffer than feels necessary.
Why don't you show me the answer between rounds?
Because knowing the target would turn the next round into arithmetic instead of a judgement, and the exercise would stop measuring anything at all.
How long does the whole thing take?
The Classic run is three rounds and takes about 75 seconds. There is a two-round Short version and a five-round Long version.

Related reading & tools

Educational, not a diagnosis.This game is a relatable, educational tool — it cannot diagnose ADHD or any condition. If your symptoms are affecting your daily life, please talk with a qualified clinician.

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