If you’ve ever wondered why it’s hard to focus, stay organized, or follow through on tasks—even ones you genuinely care about—you’re not alone. For many adults in Ontario, these struggles can point to undiagnosed Attention Deficit Hyperactivity Disorder (ADHD). The good news? You’re not stuck with questions forever. There are clear paths to getting an ADHD test for adults, and this guide will walk you through what to expect and where to start.
ADHD isn’t just a childhood condition. In fact, research shows that many individuals with ADHD aren’t diagnosed until adulthood. They often prioritise their children and overlooked their own symptoms, and due to this, nearly 15 million adults throughout the world come under this ADHD problem. The most astonishing part is only 20% of adults with ADHD are acquainted with their problems (Source). The symptoms in adults often look different than in children—think chronic procrastination, disorganization, emotional overwhelm, difficulty with time management, or feeling mentally “cluttered.”
Because adult symptoms can be mistaken for stress, anxiety, or even personality traits, people often go undiagnosed for years. If you’re exploring an adult ADHD screening, know that you’re taking an important and empowering step toward understanding your brain and unlocking new tools for your daily life.
In Ontario, a formal diagnosis of ADHD in adults must come from a licensed healthcare provider. This includes:
These medical doctors specialize in diagnosing and treating mental health conditions, including ADHD. They can conduct an ADHD test for adults to accurately assess symptoms and determine the appropriate treatment plan.
They often conduct in-depth psychological assessments and are highly trained in differentiating ADHD from other conditions.
An ADHD test for adults is not a single yes-or-no questionnaire. It’s a comprehensive process that includes:
1. Clinical Interview
You’ll discuss your symptoms, medical history, academic/work background, and any challenges that may align with ADHD traits.
2. Standardized Questionnaires and Rating Scales
These tools compare your reported symptoms to ADHD diagnostic criteria (based on the DSM-5). Common tools include the ASRS (Adult ADHD Self-Report Scale).
3. Cognitive or Neuropsychological Testing
Psychologists may assess memory, executive functioning, processing speed, and attention. This helps rule out other conditions or learning differences.
4. Third-Party Reports (Optional but Helpful)
Input from a partner, close friend, or family member can provide valuable insight into how your symptoms show up in day-to-day life.
The goal of adult ADHD screening is to gather a full picture—not just checkboxes—so that your care provider can make an accurate diagnosis and recommend personalized support.
There are several routes you can take, depending on your preferences, budget, and timeline:
Your primary care provider is often the first step. They may:
Pro tip: Prepare a written list of your symptoms and challenges to make the most of your appointment.
Private clinics specializing in ADHD assessments can typically see clients sooner than public services, though they come with a cost (ranging from $750–$2,500+). These assessments are in-depth and often include cognitive testing, detailed reports, and treatment recommendations.
Clinics to consider:
Virtual ADHD Assessment Services
Post-pandemic, many clinics now offer virtual ADHD testing for adults. These services are particularly helpful for people in rural areas or with mobility issues. They usually include:
Some EAPs provide referrals or partial coverage for assessments. Check with your HR department or benefits provider. They would help you to access an ADHD test for adults.
If you’re diagnosed with ADHD, know that there are many tools and resources to help you thrive. Treatment may include:
Even if you’re not formally diagnosed, adult ADHD screening can open up doors to support and tools that can make life easier and more fulfilling.
Getting an ADHD test as an adult may feel daunting, but clarity can be transformative. Whether you’ve lived with years of unexplained struggles or are just beginning to notice patterns, you’re not alone—and you deserve answers.