Reviewed by Dr. Courtney Dookie, Registered Psychologist and Clinical Neuropsychologist
A comprehensive ADHD assessment is not a single questionnaire or attention test. It is a clinical process designed to determine whether ADHD best explains a person’s difficulties and what recommendations may help at home, school, university or work.
How the ADHD assessment process begins
The process starts with a consultation and an intake review. The psychologist clarifies the referral question, current concerns, developmental history and whether records or information from another person may be helpful.
Clinical interview and developmental history
ADHD symptoms begin during development, even when they are not recognized until adulthood. The interview therefore considers childhood patterns, school or work functioning, organization, time management, impulsivity, emotional health, sleep, medical factors and daily impairment.
Standardized measures and testing
Rating scales, executive-function measures, attention tasks, cognitive or academic testing and collateral questionnaires may be selected according to the referral question. No single score proves or rules out ADHD.
Differential diagnosis
Anxiety, depression, trauma, sleep problems, learning disorders, autism, substance use and medical conditions can resemble or accompany ADHD. A responsible evaluation examines these possibilities instead of assuming that every attention complaint is ADHD.
How long does an ADHD assessment take?
The total timeline varies with complexity, scheduling, records and the time needed to obtain collateral information. The process commonly includes an interview, one or more testing appointments, scoring and interpretation, report preparation, and a feedback meeting. The clinic confirms the expected timeline before the assessment begins.
What happens at the feedback appointment?
The psychologist explains the findings, whether diagnostic criteria were met, important alternative or co-occurring factors and practical recommendations. When appropriate, recommendations may address treatment, workplace or school accommodations and executive-function supports.
Prepare for your assessment
- Gather relevant school, medical or previous assessment records.
- Prepare examples of difficulties across more than one setting.
- Review your developmental and mental-health history.
- Bring questions about documentation, accommodations and next steps.
Continue exploring
Review our ADHD assessment Calgary service page, adult ADHD evaluation guide, and ADHD-versus-anxiety guide.
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This article is educational and is not a diagnostic opinion.