- How do I know if my child has ADHD or is just active and easily distracted?
- What does ADHD look like in adults and women who were never diagnosed as children?
By Dr. Douglas Cowan, Psy.D., MFT
This is one of the most common questions I receive — and one of the most important to answer carefully. Because the wrong answer sends people down the wrong path for years.
ADHD is one of the most over-diagnosed and under-diagnosed conditions in mental health simultaneously. Over-diagnosed in children who are simply active, bored, anxious, or sleep-deprived. Under-diagnosed in adults — especially women — who have been managing their symptoms with extraordinary effort for decades and have been called scattered, flaky, or not living up to their potential, without ever receiving a real explanation.
Recent research makes this clearer than ever. A 2026 world-first study from Monash University found evidence of systemic underdiagnosis and misdiagnosis of females — not because women have ADHD less often, but because the diagnostic criteria, clinical training, and assessment tools were built around a male presentation. Adult women in their twenties, thirties, and forties are currently the fastest-growing demographic for new ADHD diagnoses. Many of them spent decades wondering what was wrong with them when the answer was sitting in the neuroscience the whole time.
What's Happening in the Brain
ADHD is a neurological condition — not a behavior problem, not a character flaw, not the result of insufficient effort or poor parenting. The prefrontal cortex — the brain's system for attention, impulse control, working memory, planning, and emotional regulation — is underperforming. The dopamine and norepinephrine systems that fuel motivation and sustained focus are running at a deficit.
The result is a brain that cannot reliably direct attention where it is supposed to go, hold it there when tasks become routine or unstimulating, regulate impulses before they become actions, or manage the passage of time accurately. These are neurological deficits. They are measurable. They are consistent across settings. And they are the beginning of what separates genuine ADHD from the ordinary human experience of finding boring things boring.
Now You Understand Why
This is why the child who cannot sit through homework can play video games for three hours. The video game is neurologically engineered to deliver constant dopamine. The homework is not. The brain is not being defiant. It is being honest about what it can and cannot sustain.
This is why the adult who has always felt like she was working twice as hard as everyone else to keep up — and who has been told repeatedly that she is smart but disorganized, capable but inconsistent — may be carrying an undiagnosed ADHD profile that has never been identified or addressed.
This is also why ADHD is frequently missed in women and girls. The hyperactive-impulsive presentation — the one that gets noticed early — is more common in boys. Girls more often present with the inattentive profile: quiet, drifting, appearing dreamy or spacey rather than disruptive. They internalize. They compensate. They develop anxiety as a secondary consequence of years of struggle. Recent research found that 88 percent of women with ADHD report their symptoms change across their menstrual cycle — and more than 70 percent say symptoms worsen significantly after pregnancy and during menopause. The hormonal dimension of ADHD in women is real, documented, and dramatically underappreciated in clinical practice.
What Wisdom Looks Like Here
The wisest thing you can do before acting on a suspected ADHD diagnosis is get a proper evaluation — not a rush to a prescription, not a checklist completed in a fifteen-minute appointment. A good evaluation takes time. It looks at history across settings, rules out other contributing factors, and identifies what is actually driving the symptoms you're seeing.
A correct diagnosis changes a child's life. An incorrect one can complicate it for years. Take the time to get this right.
What To Do Starting Today
In children, look for these patterns across multiple settings. The child who cannot finish homework that would take a neurotypical peer twenty minutes — but who can focus intensely on a video game, a creative project, or anything that generates genuine interest. The one who loses things constantly — shoes, backpacks, permission slips — not because he doesn't care but because working memory doesn't hold the information reliably. The one who blurts answers, interrupts, and acts before thinking — not from defiance but from a braking system that is genuinely slower than average. The one who starts strong on projects and never finishes them.
In adults, watch for this trail. Chronic disorganization that no system seems to fix for long. Difficulty finishing projects — the trail of started-and-abandoned work going back years. Showing up late despite genuinely trying not to. Forgetting conversations and appointments. Emotional reactivity that feels disproportionate and comes faster than the thinking brain can weigh in. A sense of working harder than everyone else just to keep up, without ever quite getting there.
Get a proper evaluation — not a checklist. A good ADHD evaluation includes a clinical interview, history across developmental stages, input from multiple settings, cognitive and neuropsychological testing where indicated, and a careful rule-out of other contributing conditions. The free ADHD inventory on this site is a useful starting point — it will help you organize your observations and ask better questions when you meet with a clinician.
Know that early identification in any decade changes things. It is never too late to get an accurate answer. Adults who receive a correct diagnosis at forty — who finally understand why their whole life has felt like running uphill — describe the relief as transformative. Not because the challenges disappear, but because they finally make sense. And things that make sense can be addressed.
Freedom is the goal. The door is open.
References
- Faraone, S. V., et al. (2021). The World Federation of ADHD International Consensus Statement. Neuroscience & Biobehavioral Reviews, 128, 789–818.
- Barkley, R. A. (2015). Attention-deficit hyperactivity disorder: A handbook for diagnosis and treatment (4th ed.). Guilford Press.
- Monash University. (2026). Research suggests there may be a systemic underdiagnosis of ADHD in women. Monash Medicine, Nursing and Health Sciences News.
- Kooij, J. J. S., et al. (2025). New developments in adult ADHD. World Psychiatry, 24(2), 178–196.
- Danielson, M. L., et al. (2024). ADHD prevalence among U.S. children and adolescents in 2022. Journal of Clinical Child & Adolescent Psychology, 53(3), 343–360.
- Ek, A., & Isaksson, G. (2025). Adverse experiences of women with undiagnosed ADHD. Scientific Reports, 15, 04782.