ADHD Assessment for Psychologists: Scope, Testing and Reports

An ADHD referral may arrive as a request for a diagnosis, while the difficulties described involve reading, sleep, anxiety, organisation, school participation and family conflict.

The first task is to define the questions the assessment needs to answer. Choosing measures comes next.

A useful report explains how the information supports the conclusions, where uncertainty remains and what should happen afterwards. It also makes clear which questions were outside the agreed scope.

This guide is for psychologists across Australia. It focuses on that reasoning process, particularly in child and adolescent practice, with relevant distinctions for adults. It connects clinical assessment with another practical issue: explaining what the assessment fee includes.

Information checked 26 October 2026. This is educational guidance for psychologists working within their competence and supervision arrangements. The workflow, matrices and fictional example are the author's suggested approach, not a prescribed national battery. Use current diagnostic criteria, relevant test manuals and jurisdiction-specific requirements. No test items, scoring tables or diagnostic criteria are reproduced here.

The short answer

A defensible ADHD assessment brings together the clinical interview, developmental and current history, functioning in relevant settings, rating scales and available informant information. It considers mental health, relevant medical concerns and other explanations or co-occurring conditions. ^{[1] [2]}

• Core question: Does the full account meet the diagnostic requirements, and what remains uncertain?
• Additional testing: Cognitive, academic or other measures need a referral-specific purpose; they are not an automatic ADHD battery.
• Useful output: A report that explains the evidence, its limits, agreed next steps and the scope of the service provided.

1. Define the referral question before selecting the battery

“ADHD assessment” can describe different services. Clarify what the client, family and referrer are asking, and whether those purposes can be addressed within your role.

These questions may overlap, but each additional component needs a documented reason. Record the agreed scope, likely outputs and circumstances that would prompt a discussion about further work.

2. Establish the developmental and functional account

The Australian ADHD guideline describes assessment using clinical interview, history, rating scales and relevant informant information. It also includes mental state and risk assessment, health considerations and educational or occupational functioning. ^[1]

For practical documentation, organise the account around a timeline:

• what difficulties are present now
• when comparable difficulties were first described
• where they occur and what demands expose them
• what support, structure or compensatory strategies are already present
• what changed when the difficulties became more visible
• what remains unclear

Keep historical records, retrospective recollection and current observations distinct. Where childhood information is unavailable, document the gap and its effect on confidence rather than inventing precision. Check the required onset, persistence, cross-setting pattern and impairment under the diagnostic framework you are using. A symptom count or a successful appointment observation is not the whole assessment. ^[1]

Ask about strengths and conditions under which the person functions more comfortably. Those details can inform recommendations as well as the working explanation.

3. Document competing explanations and co-occurrence

Anxiety, mood difficulties, autism, learning disorders and relevant medical conditions can occur alongside ADHD. The Australian guideline emphasises considering both differential explanations and co-occurring conditions, including the timing and pattern of functional effects. ^[2]

The clinical question is whether the evidence supports ADHD, another explanation, several contributing factors or an unresolved conclusion.

The following is an enquiry framework, not a diagnostic algorithm:

Avoid describing an explanation as excluded when it was only screened briefly. State what was assessed, what was considered and what requires another professional's input.

Medical questions need an appropriate medical pathway. A psychologist's history taking should identify relevant concerns without being presented as a substitute for physical examination or medical investigation.

4. Include the child or adolescent's own perspective

A caregiver's account is valuable, but it is not the young person's account. The guideline describes opportunities to see children and adolescents separately as well as with parents or carers. ^[1]

Plan how to explain the assessment, involvement of other people and information sharing in accessible terms. Clarify consent, assent and confidentiality according to the circumstances and applicable requirements.

Useful questions include:

• What does the young person want adults to understand?
• Which situations do they find difficult, and which feel manageable?
• What do they think existing strategies help or make harder?
• How can they contribute without relying entirely on long verbal interviews?

Describe differences between accounts rather than deciding in advance which person is the most reliable. A disagreement can generate a new question about context, opportunity to observe or the support available.

5. Distinguish diagnostic assessment from additional testing

Cognitive testing is not routinely required to diagnose ADHD. The Australian guideline discusses its possible contribution when there are additional questions about cognition, learning or co-occurring conditions. ^[1] Computerised attention or cognitive tasks also do not replace the interview, history and wider diagnostic assessment. A normal task result should not be used by itself to exclude ADHD.

For every additional measure, write a sentence explaining what question it will answer and what a different finding might change.

This is a selection framework. It does not recommend administering every component to every person.

Assess mental health with appropriate psychometrics

Differential assessment should include mental-health enquiry, with suitable psychometric measures where they help answer the clinical question. The Australian ADHD guideline distinguishes broader emotional and behavioural rating scales from targeted measures of concerns such as anxiety or depression. These support the interview and wider assessment. ^[1]

Use a measure to investigate a hypothesis, rather than to tick off a list of conditions supposedly ruled out. A low score does not establish that a condition is absent. An elevated score does not establish its diagnosis, explain its cause or exclude ADHD.

For example, an appropriate Spence Children's Anxiety Scale (SCAS) form can help describe reported anxiety symptoms in a child or adolescent assessment. The developer describes the child scale as a symptom-severity measure and says it should not determine a clinical diagnosis. Integrate the findings with clinical enquiry and other evidence rather than treating a score as a diagnosis. ^{[3] [4]}

These are examples of selection logic, not a mandatory battery or an endorsement of one tool for every presentation. A measure of anxiety does not assess every mental-health differential.

Select the correct form and explain its limits

“Spence” is not one interchangeable questionnaire. The developer provides child and parent forms and a separate preschool anxiety scale, with their own guidance. Check the form, age suitability, language, respondent and relevant normative information before administration. ^{[3] [4] [5]}

For each mental-health measure, record:

• its name, version, respondent and completion date
• why it was selected
• the scoring and normative reference used
• relevant administration or response limitations
• how findings agree or differ from the interview, history and other information
• what the results change in your formulation or next steps

Use accessible administration consistent with the measure's guidance. If adjustments affect interpretation, document that limitation. For adults, select suitable adult measures rather than carrying over a child assessment battery.

Report the contribution, not just the score

An illustrative formulation sentence is:

Anxiety ratings identified symptoms requiring further enquiry. The interview explored when these experiences began and whether attention difficulties also occurred outside situations involving worry. The ratings alone do not establish whether anxiety explains the attention difficulties or occurs alongside ADHD.

Do not write “anxiety ruled out” solely because a questionnaire score is below a threshold. Where the clinical account remains concerning, explain the discrepancy and investigate further. Mental-health questionnaires also do not replace a direct, proportionate safety assessment when concerns arise.

6. Choose cognitive measures for age and purpose

When cognitive assessment is indicated, select a suitable measure and edition, using the relevant norms and manual. Common Wechsler options include:

These age ranges overlap. In particular, choosing a child or adult measure for a 16-year-old requires judgement rather than an automatic change based on the label “adult”. Follow the publisher's guidance and consider the assessment purpose and the person's needs. ^{[6] [7] [8]}

Do not present WPPSI, WISC or WAIS testing as an obligatory step in every ADHD assessment. Explain why it is relevant to this referral, what it may add and what it cannot resolve.

Interpret FSIQ, indices and ancillary scores together

A difference between scores is a finding to interpret. It does not, on its own, identify a disorder or establish that one score represents the person's true ability.

Pearson's Australian and New Zealand WISC-V sample report explicitly describes the General Ability Index as something to interpret alongside the FSIQ and primary indices, rather than as a replacement for the FSIQ. ^[9]

For your report, check:

• the score type, confidence interval and percentile
• the exact comparison used for a claimed strength or weakness
• statistical significance and the relevant base rate
• whether the comparison is with peers or with the person's own profile
• whether the conclusion follows from the manual and the wider evidence

A relatively lower score can still be within an age-expected range. A relatively stronger score does not erase difficulties in another domain. The twice-exceptionality guide explores how high ability and disability-related needs can coexist, without making a cognitive profile diagnostic.

Avoid routinely calling the GAI “underlying potential” or dismissing the FSIQ simply because scores vary. Explain why each reported summary is useful and what it leaves out.

7. When should you investigate specific learning disorders?

Include this question when persistent reading, written-expression or mathematics difficulties are part of the referral or emerge during assessment. Do not assume that an ADHD conclusion explains every academic difficulty.

Specific learning disorder involves persistent academic skill difficulties considered in the context of history, assessment and other explanations. The American Psychiatric Association describes difficulties persisting for at least six months despite targeted help as part of the diagnostic requirements. Its public overview also describes the importance of clinical assessment and individually administered achievement measures. Check the full current manual when applying criteria. ^[10]

Auspeld similarly emphasises reviewing learning history, standardised assessment and response to targeted intervention. ^[11] The duration requirement is not an instruction to delay educational help. Provide appropriate support and record the response while clarifying the assessment question. Auspeld stresses early action rather than waiting for a child to fail. ^[11]

What to gather

For a focused learning enquiry, consider:

• the specific skill causing difficulty, rather than a broad label such as “schoolwork”
• work samples and available achievement information
• attendance, access to instruction and language of instruction
• the nature, duration and implementation of targeted intervention
• evidence of response over time
• relevant sensory, developmental, language and health information
• the learner's own account of effort, barriers and helpful support

Record where information is missing. A parent reporting “extra help” is a starting point for clarifying what was provided, not a complete intervention history.

Cognitive testing does not replace achievement assessment

A working-memory or processing-speed score does not directly measure reading, spelling, written expression or mathematics achievement. If those are the clinical questions, investigate those skills rather than inferring them from the cognitive profile.

Do not reduce the SLD decision to an IQ–achievement gap or a characteristic pattern of cognitive strengths and weaknesses. Apply the relevant diagnostic requirements and explain how the full evidence supports the conclusion.

SLD and ADHD may both need attention

The ADHD guideline identifies specific learning disorders as possible co-occurring conditions. ^[2] Your report should distinguish the evidence for each conclusion and the recommendations that follow from each.

If the evidence is insufficient for an SLD diagnosis, say what remains unresolved and what information or assessment would help. This does not prevent describing current learning needs or recommending appropriate educational support.

For adults, adapt the enquiry to their educational history and current demands. Do not assume the absence of an earlier diagnosis settles the question. The APA overview notes that, for people over 17, a documented history of learning impairment may substitute for standardised achievement assessment. This does not remove the need for comprehensive clinical assessment and consideration of other explanations. ^[10]

8. Document observations and interpretive limitations

The report should help the reader understand the assessment conditions. Consider recording relevant communication needs, sensory conditions, breaks, fatigue, distress, medication status where relevant, and any departures from standard administration.

State what you observed, what the person reported and what you infer. For example:

During the timed task, the learner worked carefully and made few errors. This observation may help explain the approach taken in that session, but does not establish how they perform across a school day.

Cooperation alone does not establish that every result is an accurate estimate of usual functioning. Describe material limitations and consult the manual when conditions or modifications affect interpretation.

Do not use a brief observation, such as eye-contact style or distractibility during one task, as a stand-alone diagnostic conclusion.

9. Integrate the evidence before writing the diagnostic conclusion

A report can list measures accurately while leaving its reasoning unclear. Include a synthesis that connects the information to the referral question.

My suggested evidence map is:

The map is a documentation aid, not a validated diagnostic instrument. Do not manufacture equal support for explanations that the evidence does not support.

A fictional adolescent example

Ari is invented for this article. This is a reasoning example, not a diagnostic case.

Ari is referred for organisation difficulties and unfinished schoolwork. Caregivers describe longstanding reminders at home. Teachers describe particularly high effort and avoidance during written tasks. Ari says writing takes so long that starting feels overwhelming.

If Ari also describes worry or low mood, the clinician should investigate these experiences, using suitable mental-health measures where useful. Those findings need to be integrated with the developmental and learning information rather than used to choose a single explanation prematurely.

The clinician needs to investigate both the developmental attention question and the writing difficulty. A cognitive assessment, if justified, would not settle the second question on its own. Educational history, the nature of the writing problem and evidence of prior instruction and support matter.

The resulting report might support ADHD, a learning disorder, both, another explanation or a need for further information. The conclusion follows the assessment; it should not be selected before it.

10. Use formulation to connect findings with a plan

Diagnosis and formulation have related purposes. The diagnostic conclusion addresses a recognised category; the formulation explains the working account of this person's difficulties, context and possible maintaining factors.

For a fuller discussion, read Provisional Diagnosis, Differentials and 5Ps Formulation.

The 5Ps can organise your synthesis:

• Presenting: What is difficult now, and what matters to the person?
• Predisposing: Which developmental and background factors may be relevant?
• Precipitating: What changed when the difficulties intensified?
• Perpetuating: Which processes or conditions may be keeping them going?
• Protective: What strengths, relationships and supports help?

Consider biological, psychological, social and cultural context across these areas. Label hypotheses as hypotheses, and identify what would lead you to revise them.

A practical formulation resource

I created the 5Ps Biopsychosocial-Cultural Case Formulation Template, a paid PDF sold through MindFrame on PsychVault, the platform publishing this article. It can provide a structure for organising your own formulation; it does not supply the diagnostic evidence or resolve uncertainty for you.

11. Translate findings into individual recommendations

Select recommendations because they address an identified need. Pearson cautions that automatically generated recommendations require individual review and editing. ^[9]

A useful recommendation can name the difficulty, proposed action, responsible person and review method. For example:

These examples are prompts for individual planning, not universal prescriptions. Check feasibility with the learner and relevant adults. Do not promise funding, examination provisions, a particular school placement or medication access on the strength of a report alone. For the next school-planning conversation, see what a useful IEP should contain; describe supports that respond to the identified needs rather than assuming a diagnosis determines the plan.

12. Explain the assessment service before accepting payment

Clients should be able to understand what you are proposing. My suggested scope summary covers:

• the referral questions and intended report audience
• the assessing clinician and relevant supervision arrangements
• interviews, ratings and additional testing included
• how collateral information will be requested with appropriate consent
• feedback and written outputs
• expected costs and agreement to additional work
• likely timing and factors that could delay completion
• the process if findings are uncertain or another assessment is indicated
• whether referral letters, school consultation or follow-up are included

If medication is an intended next step, clarify the receiving medical service's assessment and referral requirements before agreeing on the report's scope. ADHD medication prescribing requirements vary between Australian states and territories. Check the current rules with the relevant state or territory health department and confirm what the receiving prescriber needs. A psychologist's report does not guarantee acceptance by a service or access to medication. ^[12]

Be clear whether you are offering an ADHD diagnostic assessment, a broader psychoeducational assessment or both. The client should not discover that distinction only after receiving the invoice or report.

Before finalising the report

Check that:

1. 1The conclusion answers the agreed referral question.
2. 2Measures were selected for a stated purpose and suitable age range.
3. 3Sources, dates and discrepancies are visible.
4. 4ADHD and mental-health questionnaire findings are integrated with the wider assessment, with neither low nor elevated scores treated as decisive on their own.
5. 5Cognitive findings are not used as an ADHD or SLD signature.
6. 6Additional learning questions have been addressed or explicitly left open.
7. 7Score labels, intervals and comparisons match the actual scoring output.
8. 8Recommendations connect to identified needs and feasible next steps.
9. 9Limitations, unresolved mental-health questions and diagnostic uncertainty are explained in language the recipient can understand.
10. 10The person receives an opportunity to discuss findings and next steps.

A useful final supervision question is: Which conclusion in this report requires the largest inferential step, and have I made that step clear?

Sources and interpretation notes

Older US or Canadian WISC-V training material should not replace guidance for the Australian and New Zealand edition being administered. Check the edition and normative reference for any interpretive statement. Group findings in technical studies should not be used as an individual diagnostic shortcut.

1. 1.Australasian ADHD Professionals Association. Australian Evidence-Based Clinical Practice Guideline for ADHD. Diagnosis and assessment.Back
2. 2.Australasian ADHD Professionals Association. Co-occurring conditions and differential diagnosis.Back
3. 3.Spence Children's Anxiety Scale. SCAS Child: Overview.Back
4. 4.Spence Children's Anxiety Scale. SCAS Child: Scoring and Interpretation.Back
5. 5.Spence Children's Anxiety Scale. Official scales and form-specific guidance.Back
6. 6.Pearson Clinical Assessment Australia and New Zealand. WPPSI-IV A&NZ.Back
7. 7.Pearson Clinical Assessment Australia and New Zealand. WISC-V A&NZ.Back
8. 8.Pearson Clinical Assessment Australia and New Zealand. WAIS-5 A&NZ.Back
9. 9.Pearson. WISC-V A&NZ interpretive sample report. This is a publisher example, not an individual clinical assessment or a replacement for the manual.Back
10. 10.American Psychiatric Association. What are specific learning disorders?. Public overview; consult the current diagnostic manual for full requirements.Back
11. 11.Auspeld. Understanding Learning Difficulties: A Guide for Parents.Back
12. 12.Australasian ADHD Professionals Association. ADHD Prescribing Manual for Australian Healthcare Professionals: introductory guidance. Regulatory requirements vary between states and territories; check current local health-department requirements rather than relying on one national prescribing pathway.Back