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Types of ADHD: what you need to know
ADHD can present in three main ways: predominantly inattentive, predominantly hyperactive-impulsive, or combined.
A presentation describes whether inattentive features, hyperactive-impulsive features, or both are more prominent. It is not a personality type and, by itself, does not indicate how significantly ADHD affects someone’s everyday life.
A combined presentation is identified when the relevant criteria are met for both the inattentive and hyperactive-impulsive symptom groups.
A presentation is not a rigid category. The word “type” may suggest that ADHD places people into three permanent and clearly separate groups. It may also create the impression that a type fully explains all of someone’s difficulties or predicts how they will function in every situation. For this reason, a presentation is a clinical description, not a personality label. It does not describe someone’s intelligence, values or abilities. Difficulties may affect work, study and relationships in different ways. As a result, different forms of support may be helpful.
A presentation describes a pattern, not a person
A presentation does not define your personality.
By itself, it does not indicate how intelligent, creative, sociable or successful you are.
ADHD features do not appear in the same way in every situation.
It does not automatically determine what kind of support you may need.
The two main symptom groups are not completely separate. For instance, someone with a predominantly inattentive presentation may lose track of a conversation or later forget a task they were asked to complete. They may still experience restlessness or impulsivity at times. Someone with a predominantly hyperactive-impulsive presentation may be more likely to find it difficult to sit still or to interrupt others. They may also occasionally forget an important detail or appointment. For the combined presentation, the frequency and duration of features in both groups, as well as the number of settings in which they occur, are key. This is why a short description or online questionnaire cannot reliably determine someone’s presentation.
Features alone do not define a presentation
Someone can experience features from both symptom groups without meeting the criteria for a combined presentation.
Frequency, duration, daily impact and the number of settings affected all matter.
A short description or online questionnaire cannot reliably identify someone’s presentation.
A change in presentation does not mean that an earlier diagnosis was incorrect. Some people may receive considerable support from childhood, whereas others may spend years trying to mask their difficulties on their own. The demands of life can also change. In adulthood, people often need to manage deadlines, bills and everyday responsibilities more independently. As a result, different features may become more noticeable than they were earlier in life. Visible physical activity may decrease, while inner restlessness, forgetfulness and organisational difficulties remain. A few stressful weeks or a period of insufficient sleep may temporarily intensify inattentiveness and restlessness. However, this does not automatically mean that someone’s ADHD presentation has changed. Instead, it shows why the way ADHD appears should always be understood within the person’s broader circumstances.
When ADHD looks different over time
Different responsibilities and levels of support can bring different ADHD features to the foreground.
A change in presentation does not mean that an earlier diagnosis was incorrect.
Stress or insufficient sleep may temporarily intensify difficulties without changing the presentation.
Clarifying the presentation is one part of an ADHD assessment. The health professional does not simply ask someone to choose between three types. Instead, they explore whether inattentive features, hyperactive-impulsive features, or both symptom groups form a persistent pattern.
As part of this process, they consider whether the features:
have been present over an extended period and can be traced back to childhood;
appear in more than one setting, such as at home, while studying or at work;
frequently lead to forgotten tasks, lateness, unfinished work or other difficulties in everyday functioning;
relate mainly to inattentiveness, hyperactivity and impulsivity, or to both symptom groups.
The health professional also considers sleep, stress, anxiety and other possible explanations, rather than looking only at ADHD features.
How does an ADHD assessment work? →
Are “types” and “presentations” the same thing?
Can my ADHD presentation change?
Is combined presentation more severe?
Is inattentive ADHD the same as ADHD in women?
Does my presentation determine what support I need?
A presentation describes one part of the symptom pattern and gives only limited information about the whole person. It therefore does not, by itself, determine a fixed package of support. Two people with a predominantly inattentive presentation may experience very different difficulties. One may regularly miss deadlines, leave projects unfinished or forget to return calls. Another may struggle more with organising household tasks, frequently losing belongings or following conversations. Support should therefore be tailored to the difficulties that have the greatest impact on everyday life. It may involve:
support with attention, planning and completing tasks;
strategies for managing restlessness and impulsivity;
workplace or study adjustments, such as written instructions or fewer distractions;
psychoeducation, ADHD coaching or psychotherapy;
support for sleep difficulties, ongoing stress or co-occurring anxiety;
discussing medication, when appropriate and when the person wishes to consider it.
The aim is to reduce everyday difficulties and make ADHD features easier to manage, not to hide them.
Medication pathway →
Not sure where to start? Our free five-minute ADHD screener may provide a useful indication and some preliminary information. A screener is not a diagnosis and cannot replace a consultation with a suitably qualified health professional.
Ready to learn more about ADHD assessment?
Connect with a suitably qualified health professional who can help you explore what may be contributing to your experiences and whether a full ADHD assessment could be helpful.
Inattentive ADHD: what can it look like?
Not sure how inattentive ADHD may appear in everyday life? Learn about common patterns, why they can look different from person to person, and when an assessment may be worth considering.
Inattentive ADHD →
Explore the essentials
This page is the starting point for the full ADHD series. Each of the following articles explores one part of the topic in more detail.
Understanding the essentials
ADHD presentations
Assessment
This page provides general information only.
It cannot determine whether you have ADHD and it does not replace a full assessment by a suitably qualified health professional with training and experience in ADHD.
Australian ADHD Professionals Association, 2022. Australian evidence-based clinical practice guideline for attention deficit hyperactivity disorder (ADHD). https://adhdguideline.aadpa.com.au/
New Zealand Ministry of Health, 2025. New Zealand clinical principles framework for attention deficit hyperactivity disorder. https://www.health.govt.nz/publications/new-zealand-clinical-principles-framework-for-attention-deficit-hyperactivity-disorder
National Institute for Health and Care Excellence, 2018 (updated 2019, reviewed 2025). Attention deficit hyperactivity disorder: Diagnosis and management (NICE Guideline NG87). https://www.nice.org.uk/guidance/ng87
Centers for Disease Control and Prevention, 2026. ADHD in adults. https://www.cdc.gov/adhd/about/adhd-in-adults.html
CADDRA – Canadian ADHD Resource Alliance, 2020. Canadian ADHD practice guidelines (4.1 ed.). https://www.caddra.ca/canadian-adhd-practice-guidelines