ADHD glossary · Family perspectives
Time estimation: separate a task guess from a deadline
In Stanford's college project-planning guidance, estimating task length means judging how long a listed task may take. [1]
General education and practical perspectives. Editorial standards.
What does estimating task time mean here?
This page uses that narrow planning meaning, not a scientific definition of time perception. An estimate is a proposed duration. A deadline names a latest time. In the example below, those are separate fields; writing one does not establish the other or make the estimate a promise.
An RDY worked example: what did “fifteen minutes” include?
These numbers and this scene are invented. They are not measured family data or population averages.
Two partners are putting a borrowed board game back in its box. One proposes fifteen minutes. They agree that the task includes sorting the pieces, checking the supplied contents list, and closing the box. They start at 6:00 and finish at 6:22. For seven minutes, both stop to answer a visitor at the door.
Their note says “22 minutes elapsed, including a seven-minute interruption.” They do not compare that directly with fifteen minutes of uninterrupted work as though the definitions matched. They also do not turn one attempt into a claim that this task always takes a particular time or that either person misjudges time generally.
Copy an estimate-and-context note
Task, including what counts as finished:
What is outside this estimate:
My current estimate:
Does it include breaks or waiting? Explain:
Deadline, if there really is one:
Actual start and finish, only if I choose to record them:
Interruptions or changes to the task:
What I would describe differently next time:
The purpose of this note is to state what the numbers refer to. Recording is optional. Do not secretly time someone, compare siblings, or create a penalty for departing from an estimate.
Different perspectives
The same situation can feel different depending on your place in the family. Start with the perspective that fits, and make room for the other person’s account.
Person doing the task
say what you included before someone treats your estimate as a commitment.
Parent or child
keep travel, waiting for an adult, and the child's own action distinct in your account.
Partner or grandparent waiting for a handoff
state the time you need an update. Do not assume the other person knew it was a deadline.
Related guides
Questions you may have
Should we add a fixed percentage to every estimate?
No universal multiplier is proposed. You can record uncertainty or leave a range, but this page does not prescribe a formula.
Is this a way to measure “time blindness”?
No. This is a single-task planning note, not a test or an interpretation of a psychological term.
Is buffer time part of the same thing?
For this note, keep any deliberately unassigned margin separate from the expected task duration. That makes your intended arrangement explicit without claiming a scientific rule.
Evidence and limitations
[1] Project Planning in College, Stanford Center for Teaching and Learning. Accessed September 5, 2026; no publication date displayed. The first sentence under “Estimate task length and assign to dates” supports [1]; full publisher HTML was inspected. Scope is college project planning. No population tendency, accuracy benefit, clinical explanation, or prescribed duration is adopted. The numerical example and form are RDY's own proposed illustration, not Stanford's handout.
Sources and what they support
These sources support the specific statements identified below. Our practical exercises are suggestions to consider, not evidence of a treatment effect.
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Project Planning in College — Stanford Center for Teaching and Learning
Source type: institutional.
Accessed .
Source check, September 5, 2026: Scoped source check. Passage: Estimate task length and assign to dates, first sentence; retrieved lines 92–94. Limits: College project-planning usage, not a scientific definition of time perception. Publication/update date not displayed. No tendency, effect, task-duration rule, or accuracy claim adopted; no handout copied.
Supports: In Stanford's college project-planning guidance, estimating task length means judging how long a listed task may take.
Correction check: No correction/retraction notice found in the publisher title and material inspected; focused correction-marker check found none. Not exhaustive bibliographic clearance.
Updates and corrections
Published .
Found a factual error or something unclear? Use the contact route on our Trust page. Read our research method for the evidence approach.