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Part A Screening Complete

Part A: Core ADHD Symptoms

Part B: Symptom Frequency Assessment

Your ADHD Screening Results

Evidence-based 18-question assessment developed by WHO and Harvard Medical School

ADHD Screening Test (ASRS v1.1)

About This Assessment

The ASRS v1.1 Screening Tool: This assessment is based on the World Health Organization's Adult ADHD Self-Report Scale, developed in collaboration with Harvard Medical School. It consists of 18 questions divided into two parts:

Attention Difficulties

Adult ADHD often presents differently than childhood ADHD. While children may show obvious hyperactivity, adults typically experience:

Hyperactivity & Impulsivity

Understanding Adult ADHD Symptoms

Common Adult ADHD Challenges

Core ADHD Symptoms in Adults

Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder that affects approximately 4.4% of adults worldwide. While often associated with childhood, ADHD frequently persists into adulthood, with many individuals receiving their first diagnosis well into their 20s, 30s, or beyond.

Comprehensive ADHD evaluation involves multiple assessment methods conducted by qualified healthcare professionals. The process typically includes clinical interviews, standardized rating scales, review of developmental history, medical evaluation, and assessment of functional impairment across work, education, relationships, and daily activities.

ADHD Diagnosis: What to Expect

Undiagnosed ADHD in adults can lead to significant challenges including underachievement, relationship difficulties, financial problems, and increased risk of anxiety and depression. Early recognition and appropriate treatment can dramatically improve quality of life, work performance, and relationships.

Why Early Recognition Matters

Understanding ADHD in Adults

Effective ADHD treatment typically involves a multimodal approach:

Treatment Options

adhdtests.net provides an evidence-based ADHD self-screening experience based on WHO ASRS v1.1, plus educational resources to help you understand your symptoms.

Uses the clinically validated ASRS v1.1 questionnaire for adult ADHD screening.

Evidence-based Evaluation

Simple interface for a quick, private assessment on any device.

User-Friendly & Accessible

Educational resources and next-step guidance tailored to your results.

Resources & Guidance

How to Use

About ADHD Test Center

adhdtests.net is free, private, and easy to use. We provide accurate screening using WHO ASRS v1.1 and evidence-based resources and next-step guidance.

Why Choose Us

Adult Attention-Deficit/Hyperactivity Disorder (ADHD) affects about 2.8% of adults worldwide and can impact attention, activity level, time management, and relationships.

Many adults have had symptoms since childhood but are only recognized later. Early screening and support can improve quality of life and work performance.

Test Structure

About Adult ADHD Screening

Take the first step toward better understanding your attention patterns and symptoms.

Ready to Understand Your ADHD Risk?

Frequently Asked Questions

Uses WHO-developed ASRS v1.1, clinically validated

Evidence-based

Finish 18 questions in about 5 minutes and get instant results

Fast & Convenient

Screening answers are processed in your browser and saved locally so you can resume; they are not sent to an adhdtests.net application backend.

Private by Design

Personalized next steps based on your results

Actionable Guidance

Why Choose Our ADHD Screening Tool

ASRS v1.1 screening, about 5 minutes, answers stay in your browser

Free Online ADHD Self-Test

Quick & Confidential

ADHD Screening

Take a free 5-minute adult ADHD self-test using the WHO-developed ASRS v1.1 screening questions. View an instant Low, Medium, or High risk summary and practical next steps. Answers stay in your browser; screening is not a diagnosis.

Adult ADHD Screening and Learning Center

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Choose your learning path and discover evidence-based insights about adult ADHD

Master ADHD Knowledge

Complete guide to the Adult ADHD Self-Report Scale

ASRS v1.1 Guide

Understanding the fundamentals of adult ADHD

ADHD Basics

Common Questions

Evidence-based treatment and coping strategies

ADHD Management

Evidence-based information about ADHD and the ASRS v1.1 tool

ADHD Education

Document preview

Related resources

Comprehensive guides and information about ADHD and the ASRS v1.1 assessment tool

ADHD Resources

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ADHD Resources & Downloads

CHADD 2026 fact sheet on ADHD and pediatric bipolar disorder: overlapping symptoms, differential diagnosis, mood-stabilizer + stimulant sequencing and family monitoring.