ADHD glossary · Family perspectives
Adolescence: an age convention is not an ability judgment
The World Health Organization describes adolescence as the period between childhood and adulthood and uses ages 10 through 19 for that period. [1]
General education and practical perspectives. Editorial standards.
That is WHO's stated age convention. It does not say that everyone within that range has the same abilities, responsibilities, interests, or legal status. This glossary uses it to clarify the subject of a source, not to make a prediction about a particular person.
A range in a report is not a profile of a reader
In a fictional school discussion, a group reads a report described as being about adolescents. One student asks whether that means the report applies equally to everyone in the school.
The group can look for the report's own population description. What ages were included? What setting does it concern? Is the passage reporting a finding, defining a term, or describing a program? The word in the title does not answer all of those questions.
WHO's range provides one clear convention, but this page does not assume that an unnamed source used it. Keep an unreported age range marked as unknown until the source supplies it.
The person is not the category
Imagine a family planning a reunion with an “adolescent activities” session. Alex asks whether that means joining the photography group or being placed in a separate room.
The organizer can explain the actual options. Alex's age does not tell the organizer which activity Alex wants. Nor does preferring the photography group require an argument about whether Alex is mature enough to count as one kind of person.
An optional question is, “Which activities are available, and can participants choose among them?” That concerns the event. It does not establish a general rule about which decisions young people should make.
Do not borrow legal meaning from a health term
An age range in a health-topic definition is not a statement about legal adulthood, consent, employment, school eligibility, or access to a service. Those questions require the relevant rules and context; this page does not answer them.
For a source-reading note, you might record, “WHO terminology: ages 10–19; report's actual ages: not yet checked.” That keeps the convention separate from the report being read.
If a program supplies a different age range, quote or summarize that program's actual range accurately. Do not silently change it to WHO's convention or announce that one label settles participation.
A broad period, many possible conversations
The child-development page introduces a broad developmental subject with its own source boundary. The autonomy page focuses on self-direction in ordinary choices. Neither makes a person's age an assessment of their preferences or decision-making.
A caregiver can ask what a resource means by adolescents before applying its wording to a family discussion. An educator can identify a source's actual population. A teen can ask for an explanation of a category without agreeing to a stereotype about it.
No age-based behavior checklist, brain-maturity claim, health prediction, or developmental advice is provided here. The next useful detail is the context attached to the age label—and, when the discussion concerns a person, that person's own account.
Source
[1] World Health Organization. Adolescent health. World Health Organization. Publication/update date not identified. Accessed September 6, 2026. Overview, first paragraph; surrounding overview and WHO response context. Supports [1] only; fictional illustrations and optional wording are not source procedures or evidence of benefit.
Related guides
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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Adolescent health — World Health Organization
Source type: institutional.
Accessed .
Source check, September 6, 2026: Scoped source check. Passage: Overview, first paragraph; surrounding overview and WHO response context. Limits: Only WHO's age convention is adopted. It is not a developmental milestone, a prediction of ability, a legal majority/consent rule, or a medical recommendation. Health outcomes, prevalence and clinical guidance elsewhere on the page are outside scope.
Supports: The World Health Organization describes adolescence as the period between childhood and adulthood and uses ages 10 through 19 for that period.
Correction check: No correction notice affecting the adopted age convention appeared in the inspected page. No overview-specific publication/update date was supplied; news dates elsewhere are not treated as its date. No complete archive or external correction audit performed.
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.