Do I Have ADHD? Understanding ADHD Testing in Adults

Many adults in Montreal seek an ADHD assessment because they:

• start projects but struggle to finish them
• feel mentally exhausted or overwhelmed despite trying hard
• procrastinate (“It’s going to take forever — I’ll never be able to sit down for that many hours”)
• notice their performance is inconsistent, leading to anxiety (“Will I do good work this time, or will I leave a ton of mistakes behind?”)
• feel they cannot trust their memory (“What will I forget this time?”)
• begin questioning ADHD after a major life transition or after their child receives an ADHD diagnosis

ADHD or Anxiety? Here’s the tricky part

Think about how your mind functions when you are going through a major life stressor or experiencing chronic anxiety. During those periods, you may experience difficulties that feel just like ADHD symptoms. For example, anxiety itself can reduce concentration, increase distractibility, and affect working memory.

In other words, anxiety can sometimes look like ADHD.

The reverse can also be true: untreated ADHD may contribute to anxiety over time. When performance feels unpredictable, daily tasks become harder to manage, and mistakes accumulate despite effort, anxiety can develop secondarily.

The differential process is a crucial part of a neuropsychological evaluation: during the assessment process your clinician will ask themselves a multitude of questions like "Are the attentional difficulties primary?", "Are they better explained by anxiety, stress, burnout, depression, sleep difficulties, or another condition", "Could multiple factors be interacting together?"

What Is Included in an ADHD Assessment?

This process is not simply about “getting a diagnosis.” It is a comprehensive clinical process aimed at understanding the underlying causes of a person’s difficulties - a complex task we are very invested in.

Our 4-step assessment includes:
• a detailed clinical interview reviewing the ADHD-like symptoms, developmental history, functioning, and mental health (step 1)
• standardized questionnaires filled by you, your loved one(s), your parents (step 2)
• cognitive testing administered by a neuropsychologist over 2 separate weeks (step 2)
• and careful consideration of alternative explanations for symptoms in the analysis process (step 3)
• a characterisation of your cognitive profile, its strengths and weakness compared to other humans of your age (step 3)
• a detailed report of 10+ pages is then written to share our findings and hypothesis with you (step 3)
• a complex understanding of you is then shared with you during the feedback session (step 4)

While questionnaires are an important part of the assessment process, a valid ADHD diagnosis should never rely on questionnaires alone. Online questionnaires and symptom checklists are self-reported and can frequently  suggest ADHD, but many conditions can mimic ADHD symptoms.

For that reason, comprehensive neuropsychological assessment goes far beyond questionnaires alone. A valid ADHD diagnosis requires that symptoms are not better explained by another condition (DSM-5 Criterion E).

ADHD assessment is a nuanced clinical process. Reducing diagnosis to questionnaires alone risks overlooking the underlying causes of a person’s difficulties. Our goal is not simply to identify symptoms, but to understand why they are occurring.

Sometimes the conclusion is ADHD.

Sometimes it is something else.

Good assessment is not about labeling people — it is about understanding so that treatment and recommendations can meaningfully address the actual source of the difficulties.

This is work we take seriously and with great care.

When should you consider a neuropsychological evaluation for adult ADHD?

If your difficulties affect daily functioning or quality of life, guidance may be worthwhile.