Subjective time is not a clock reading. It stretches when you are unengaged and compresses when you are absorbed. Everyone experiences this. What differs is the size of the time distortion ADHD produces and the reliability of the background correction that normally keeps it in check.
Both directions, same mechanism
Five minutes of something unstimulating — a queue, a form, a meeting with no role for you — can feel like twenty. Three hours of something absorbing can feel like forty minutes. These are the same process running in opposite directions, and both are consequential.
The expansion direction is the one that shapes behavior most. A task that feels like it will take an hour gets priced as an hour, avoided accordingly, and turns out to take nine minutes. The avoidance was rational given the estimate. The estimate was the problem.
Why the correction fails
Most people run a quiet background check against the distortion — a sense that although this feels endless, it has probably been ten minutes. That check requires holding a sequence in mind and placing yourself within it, which is a working memory operation.
Barkley’s model, summarized by CHADD, Executive Function Skills, treats nonverbal working memory as foundational and explicitly includes the sense of time within it. When that capacity is unreliable, the raw subjective experience runs uncorrected. What it feels like is what you get.
What it actually costs
| Effect | How it plays out |
|---|---|
| Small tasks feel expensive | Priced far above their real cost, so avoided |
| Absorbing tasks overrun | Hours pass with no internal signal |
| Waiting is disproportionately hard | Unstimulating time expands most |
| Planning compounds errors | Each estimate is wrong and they accumulate |
| Lateness despite effort | Preparation time systematically under-counted |
What helps
Measure once, then stop estimating
Time the tasks you avoid. Write the number down and keep it. When the feeling says an hour and your note says nine minutes, you have something to argue with. Estimates do not improve by trying harder; they improve by being replaced.
Use a visible timer for both directions
For dread tasks, seeing time run shorter than expected corrects the inflation directly. For absorbing work, the timer is the interrupt that no internal signal will supply.
Make waiting stimulating
Unengaged waiting expands the most, so filling it — audio, something to read — measurably shortens it. This is not avoidance; it is targeting the specific condition that produces the distortion.
Count preparation separately
Journey time is not the time from door to destination. It includes finding keys, shoes, the walk to the car, the bit you always forget. Counting those separately is the main fix for chronic lateness.
Common questions
Does everyone experience this?
Yes — the phenomenon is universal. The difference is amplitude and how reliably it is corrected.
Why do I under-estimate long tasks and over-estimate short ones?
Because the estimate tracks the anticipated feeling rather than the duration. Dread inflates, and interest compresses, regardless of the actual clock time involved.
Do timers stop working?
They stop being noticed once habituated. Changing the sound, position, or type restores the interrupt.
Sources
- CHADD, Executive Function Skills — Barkley’s nonverbal working memory, including sense of time
Inchy publishes general information, not medical advice. Difficulty with attention, time, and task initiation has many possible causes. If it is affecting your work, health, or relationships, speak to a qualified clinician who can consider your full situation. See our editorial policy.