You cannot diagnose ADHD at home, but you can screen for it with validated questionnaires that clinicians themselves use as a first step. These self-report tools won’t replace a professional evaluation, but they can tell you whether your symptoms fall into a range that warrants one. For adults, the most widely used screener takes under five minutes. For children, parent-completed rating scales cover the same symptom domains that clinicians assess in their offices.
The ASRS Screener for Adults
The Adult ADHD Self-Report Scale, developed by the World Health Organization and researchers at Harvard Medical School, is a six-question screening tool that asks how often you experience core ADHD symptoms like difficulty finishing tasks, trouble keeping attention during boring work, and feeling overly active or restless. Each question is rated from “never” to “very often” on a five-point scale, and your answers are converted to a score between 0 and 24.
A score of 14 or higher screens positive for ADHD. The scale breaks down further: 0 to 9 is low negative, 10 to 13 is high negative (meaning unlikely but not impossible), 14 to 17 is low positive, and 18 to 24 is high positive. The screener is free and publicly available through Harvard’s National Comorbidity Survey website. It’s the same tool many primary care doctors hand you at a first appointment, so completing it beforehand can save time and give you something concrete to bring to a clinician.
The Vanderbilt Scale for Children
If you’re screening a child, the most commonly used home tool is the Vanderbilt Assessment Scale, a parent-completed questionnaire designed for kids ages 6 to 12. It divides symptoms into two domains: inattention (questions 1 through 9) and hyperactivity/impulsivity (questions 10 through 18). You rate each behavior on a four-point scale from “never” to “very often.”
Symptoms scored as “often” or “very often” are the ones that count toward a potential ADHD profile. The scoring looks at how many of those high-frequency ratings you marked in each domain. A child needs at least six symptoms in one or both domains to meet the diagnostic threshold, and those symptoms need to be present in more than one setting, which is why schools are typically asked to fill out a separate teacher version of the same form. You can download the parent version for free from multiple university pediatrics departments.
What These Screeners Can and Cannot Tell You
A positive result on any home screener means your symptom pattern overlaps with ADHD. It does not mean you have ADHD. Anxiety, depression, sleep disorders, thyroid problems, and even chronic stress can produce symptoms that look nearly identical to ADHD on a questionnaire. The value of screening at home is in narrowing the question: if you score well below the threshold, ADHD is less likely to explain what you’re experiencing. If you score above it, you have a clear reason to pursue a formal evaluation rather than wondering.
For a formal diagnosis, clinicians look at several things a screener can’t capture. They verify that symptoms started before age 12, that they show up in at least two settings (work and home, for example), and that they cause meaningful impairment rather than just occasional frustration. Adults need five or more symptoms in the inattention or hyperactivity/impulsivity category. Children up to age 16 need six or more. A clinician also rules out other conditions that mimic ADHD, which is the step no questionnaire can replace.
Online ADHD Assessments
Several telehealth platforms now offer structured ADHD evaluations you can complete remotely. These go beyond a simple screener by combining questionnaires with a clinical interview conducted over video. One tool worth knowing about is QbCheck, the only online ADHD test cleared by the FDA for use in diagnosing and monitoring ADHD in children, adolescents, and adults. It measures the three core signs of ADHD (hyperactivity, inattention, and impulsivity) through a computer-based attention task paired with movement tracking.
A study published in The Journal of Clinical Psychiatry found that a structured online assessment correctly identified over 80% of ADHD-positive cases when compared against a traditional clinical interview. Notably, the online assessment was more conservative than the in-person evaluation, meaning it was less likely to over-diagnose. In cases where the two methods disagreed, over 80% of those people turned out to have ADHD on clinical interview but had been flagged by the online tool for further assessment rather than given a diagnosis outright. That’s a feature, not a flaw: a cautious screener sends you to a clinician rather than giving you a premature answer.
What a Professional Evaluation Costs
One reason people search for home testing is cost. A standard diagnostic assessment by a licensed psychologist or psychiatrist typically runs between $400 and $800. A basic screening through a primary care doctor is cheaper, usually $150 to $300, while a comprehensive neuropsychological evaluation with in-depth cognitive testing can reach $1,000 to $2,500. Online telehealth evaluations tend to fall in the $150 to $400 range and often include a virtual consultation, standardized questionnaires, and follow-up.
Insurance coverage varies widely. Many plans cover an ADHD evaluation when it’s ordered by your primary care provider, but some require a referral or limit which specialists are in-network. If cost is a barrier, starting with a validated free screener at home and then bringing your results to a primary care appointment is the most affordable path. Your doctor can often make a diagnosis based on a clinical interview and your screener results without referring you for expensive neuropsychological testing, which is typically reserved for complex cases where other conditions need to be ruled out.
How to Get the Most From Home Screening
Fill out the screener in a calm moment, not during a particularly stressful or scattered day. Answer based on how you’ve felt over the past six months, not just the past week. If you’re screening a child, try to separate behaviors that happen in one specific situation (like resisting homework) from patterns that show up across multiple settings.
It also helps to ask someone who knows you well to fill out the same screener about you independently. ADHD symptoms are often more visible to others than to the person experiencing them. A partner, close friend, or family member may notice patterns of forgetfulness, impulsivity, or restlessness that you’ve normalized over the years. Bringing both perspectives to a clinician gives them a fuller picture and can speed up the evaluation process.
For children, completing both the parent Vanderbilt form and asking a teacher to fill out the teacher version before your pediatrician appointment means the clinician has multi-setting data from the start. Many pediatricians won’t move forward with a diagnosis until they have input from both home and school, so doing this legwork in advance can cut weeks off the timeline.