Adult ADHD assessment: making sense of the history behind the questionnaire

The questionnaire felt familiar. The result seemed to explain a lot. Then came the next question: what would a proper adult ADHD assessment involve?

Screening can be a starting point for a conversation. A structured evaluation takes more time to understand the history, the pattern across settings and the effect on everyday life. The aim is to reach a well-supported conclusion, including when the evidence points towards a different explanation or further assessment.

Why history matters

The Australian ADHD clinical practice guideline says diagnosis should not be based solely on rating scales or observations. Clinical assessment considers relevant symptoms, impairment and information across settings. A questionnaire can contribute evidence, but the score needs to be interpreted within that wider picture.

For an adult, useful preparation may include examples from school, study, work, home organisation or relationships. Records can help where available. If they are missing, say so at the outset rather than assuming the enquiry cannot proceed. The clinician can explain which other information might be useful and where limitations may remain.

Bring examples that show the pattern

“I cannot organise anything” conveys frustration, but it is broad. An illustrative example would describe missed deadlines despite reminders, the systems tried and whether the difficulty also appears outside work. Another person may describe a very different pattern. The purpose is to understand your experience rather than match an example from the internet.

Furthermore, include the circumstances in which things go better. External structure, interest, support or a different environment may change how difficulties appear. Those details can make the discussion more informative than a list of problems alone.

Consider the whole referral question

Sleep, mental health, learning, autism-related questions and medical factors may need consideration. Tell the assessor what you already know, which treatments or supports you have tried and what you hope the assessment will clarify. Some enquiries require input from more than one professional.

A cognitive assessment may be useful for a separate question about thinking or learning. It should not be assumed that an IQ test by itself establishes or excludes ADHD.

Clarify the outcome you need

Ask whether the agreed service is screening, a fuller psychological assessment, a written report or support after an existing diagnosis. If medication is the main purpose of the enquiry, clarify the medical prescriber pathway before booking. Psychologists do not prescribe medication, and another clinician may have their own assessment requirements.

Meyer Institute's ADHD assessment page explains the adult and younger-person enquiry pathways. If the next step is unclear, the autism and ADHD screening page describes a starting option. For overlapping questions, see diagnostic clarification.

In a first enquiry, give your age, main question, intended report use and preferred format. Fees and scope for ADHD work are confirmed separately; the standard IQ package should not be assumed to cover a full ADHD evaluation.

Research guidance: Australian evidence-based ADHD clinical practice guideline.