ASRS Screener — Adult ADHD Self-Report Scale

The Adult ADHD Self-Report Scale, version 1.1 (ASRS-v1.1) is an 18-item self-report instrument developed by Kessler and colleagues in 2005 in collaboration with the World Health Organization. Each item maps directly to one of the 18 DSM-IV/DSM-5 ADHD symptom criteria, rated on a 5-point frequency scale (Never / Rarely / Sometimes / Often / Very Often) over the past 6 months. Within the 18 items, six items form the optimized 6-item ASRS Screener — the brief detection subset Kessler 2005 identified as the strongest screening combination. The instrument is copyrighted, not public domain, and is the most widely cited brief adult ADHD screener globally.

The instrument is sometimes called simply "the ASRS" or "the 18-item ASRS." When people refer to "the ASRS Screener" specifically, they often mean the brief 6-item version embedded inside the full 18-item form. Both versions share the same items and the same response scale; they differ in scoring and what they're optimized for.

The ASRS exists at the intersection of three properties that make it the canonical adult ADHD screening tool: (a) open licensing for the screener — the 6-item version is free to use with attribution; (b) brevity — 18 items in approximately 5 minutes; and (c) direct DSM mapping — each item corresponds 1:1 to a DSM symptom criterion, supporting both screening and clinical interpretation.

The ASRS matters because it is the bridge between the recognition that adult ADHD is real and consequential, and the practical work of getting people who have it into evaluation and treatment. Before the ASRS, brief adult ADHD screening relied on instruments that were proprietary, long, or both — the Conners' Adult ADHD Rating Scale at 66 items, the Brown ADD Scales at 40 items. Neither was suitable for population-level epidemiology or for self-screening at scale.

The ASRS was designed for the World Mental Health Survey Initiative — the WHO project that produced the first comparable global estimates of mental disorder prevalence across countries. The same instrument that supports population epidemiology also serves clinical screening, primary-care referral decisions, and consumer self-screening. This dual role — epidemiology AND practice — is unusual and is part of why the ASRS achieved its dominant position.

Practically: the ASRS is what produces the best US adult ADHD prevalence estimate (4.4% per Kessler 2006), what most adult ADHD research uses as the entry-point screening instrument, and what most consumer adult ADHD tests are based on. Understanding the ASRS is understanding the empirical foundation of contemporary adult ADHD care.

The ASRS was developed by Ronald Kessler at Harvard's Department of Health Care Policy in collaboration with the World Health Organization, for use in the World Mental Health Survey Initiative — the WHO project producing the first internationally comparable estimates of psychiatric disorder prevalence. The development paper:

Kessler RC, Adler L, Ames M, Demler O, Faraone S, Hiripi E, Howes MJ, Jin R, Secnik K, Spencer T, Ustun TB, Walters EE. The World Health Organization Adult ADHD Self-Report Scale (ASRS): a short screening scale for use in the general population. Psychological Medicine. 2005;35(2):245–256. doi:10.1017/s0033291704002892

The development sample drew from the National Comorbidity Survey Replication (NCS-R), a US household survey with structured diagnostic interviews. ASRS responses were compared with blind clinical ratings of DSM-IV adult ADHD in 154 NCS-R respondents, a sample that oversampled people who reported childhood ADHD and its persistence into adulthood.

The Kessler 2005 paper documented two interrelated findings. First, each of the 18 questions was significantly related to the matching clinical symptom rating, but agreement varied widely from symptom to symptom (Cohen's κ 0.16–0.81). Second, a 6-item subset of the 18 items — the "ASRS Screener" within the larger ASRS scale — outperformed the full 18 items at classifying clinical cases (sensitivity 68.7% vs 56.3%; specificity 99.5% vs 98.3%). The 6-item subset is items 1 through 6 of the ordered instrument (Part A of the symptom checklist).

The instrument has since been used in many epidemiological studies.

The 18 items map to the 18 DSM-IV/DSM-5 ADHD symptom criteria — 9 inattention items mapping to DSM criterion A1, and 9 hyperactivity-impulsivity items mapping to criterion A2. Each item is rated 0–4 on a 5-point frequency scale (Never / Rarely / Sometimes / Often / Very Often) referenced to the past 6 months. Items 1–6 (marked ★ below) form the optimized 6-item screener.

Subscale structure

• Inattention subscale — items 1, 2, 3, 4, 7, 8, 9, 10, 11 (n=9). Range 0–36.
• Hyperactivity-Impulsivity subscale — items 5, 6, 12, 13, 14, 15, 16, 17, 18 (n=9). Range 0–36.
• Total score — sum of all 18 items. Range 0–72.
• 6-item ASRS Screener subset — items 1, 2, 3, 4 (Inattention) and items 5, 6 (Hyperactivity). Note that the screener is heavily inattention-weighted: 4 of 6 items are inattention, only 2 are hyperactivity.

Two scoring rules are used in parallel: a continuous total score from the full 18 items, and a binary classification from the 6-item screener subset.

Continuous total scoring

Each item is scored 0 (Never), 1 (Rarely), 2 (Sometimes), 3 (Often), 4 (Very Often). The total is the sum across all 18 items, range 0–72. Subscale sums are computed for Inattention (items 1, 2, 3, 4, 7, 8, 9, 10, 11) and Hyperactivity-Impulsivity (items 5, 6, 12, 13, 14, 15, 16, 17, 18), each ranging 0–36. There is no published clinical-consensus severity band system — the instrument was designed for binary screening, not severity grading. The only available distribution data come from the Kessler 2005 clinical-reappraisal subsample, weighted to the NCS-R general population (mean 17.19 on the 0–72 total; see the norms below).

6-item screener binary classification

The 6-item screener uses item-specific cutoffs from Kessler 2005. A response is "positive" if it meets or exceeds the item's cutoff. Four or more positive items overall indicates a positive screener.

Internal consistency

Adler et al. (2006) reported Cronbach's α of 0.88 for the pilot ASRS self-report in 60 adults with ADHD. For the 6-item screener, Kessler et al. (2007) reported internal consistency of 0.63–0.72 in a sample of 668 health-plan members.

Diagnostic accuracy of the 6-item screener

In the same study, the full 18 items showed 56.3% sensitivity and 98.3% specificity. These figures describe that study and are not universal: performance and predictive value vary with setting, population, prevalence, language, and scoring method.

Test-retest reliability

For the 6-item screener, Kessler et al. (2007) reported test-retest correlations of 0.58–0.77 in the same health-plan sample.

Translations

The ASRS has been translated into many languages.

Population norms anchor a score to the distribution of scores in a defined sample. For the ASRS-v1.1, the scale's distributors at Harvard note that the only available distribution data come from the clinical-reappraisal subsample of the US National Comorbidity Survey Replication (the 154 adults of Kessler 2005), weighted to represent the NCS-R general population.

It is a screen, not a diagnostic tool

The most important limitation. A positive screen indicates that ADHD-symptom levels warrant clinical attention. It does not constitute a diagnosis. Only a qualified clinician can diagnose ADHD via a comprehensive evaluation that addresses all five DSM-5 criteria: symptom thresholds, childhood-onset, multiple settings, functional impairment, and exclusion of better-explanation by another condition.

It does not assess childhood-onset

DSM-5 requires evidence of ADHD symptoms before age 12 for adult diagnosis. The ASRS asks only about the past 6 months. A high score with no childhood-symptom history points to alternative explanations (depression, anxiety, sleep disorders, head injury, perimenopause, thyroid dysfunction, chronic stress) rather than primary ADHD.

It does not assess functional impairment

DSM-5 requires several symptoms in two or more settings and clear evidence that the symptoms interfere with, or reduce the quality of, social, academic, or occupational functioning. The ASRS does not include functional-impairment items (unlike the PHQ-9, which has a 10th item asking how much symptoms have affected work, home, or social life). A high symptom score without significant functional impact may not warrant clinical diagnosis.

It does not screen for comorbidities

Adult ADHD has high comorbidity with anxiety disorders (~47%), mood disorders (~38%), and substance use disorders (~15%) per Kessler 2006. The ASRS screens only for ADHD-symptom domains; a comprehensive evaluation should add screens for these common companions.

The 6-item screener is inattention-weighted

Of the 6 items in the screener subset, 4 are inattention items and only 2 are hyperactivity-impulsivity items. This weighting is appropriate for adult populations (where the inattentive presentation is more common than the hyperactive presentation) but means the brief screener under-detects pure-hyperactive presentations. The full 18-item form does not have this asymmetry.

Self-report is subject to bias

Like all self-report instruments, the ASRS is subject to insight limitations, social desirability bias, and recall bias. Adults with ADHD sometimes under-report (because attention difficulties feel "normal" and familiar) and sometimes over-report (when seeking diagnosis to access treatment). Informant ratings (partner, family) and clinician observation provide complementary perspectives that this self-screen cannot.

Past-6-months reference window

The instrument captures current functioning over the past 6 months. It does not capture trait-level ADHD vulnerability across the lifespan, nor does it distinguish current ADHD from a recent episode of depression that produces ADHD-like attention symptoms. This is one reason childhood-onset documentation matters for clinical interpretation.

The ASRS is the right choice for self-screening, primary-care screening, and population epidemiology. Other instruments serve different purposes.

For most adult ADHD self-screening contexts, the ASRS is the right starting point. If the ASRS screens positive, a clinician may use the Conners' or Brown scales as part of a more comprehensive evaluation. The WURS is the natural complement to the ASRS for the childhood-onset criterion: WURS for childhood symptoms, ASRS for current symptoms.

Other LifeByLogic glossary entries that connect to the ASRS Screener.

How to cite this entry

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LifeByLogic. (2026). What Is the ASRS? The WHO Adult ADHD Self-Report Scale. https://lifebylogic.com/glossary/asrs-screener/

LifeByLogic. "What Is the ASRS? The WHO Adult ADHD Self-Report Scale." LifeByLogic, 25 Oct. 2026, https://lifebylogic.com/glossary/asrs-screener/.

LifeByLogic. 2026. "What Is the ASRS? The WHO Adult ADHD Self-Report Scale." October 25. https://lifebylogic.com/glossary/asrs-screener/.

@misc{lblasrsscreener2026,
  author = {{LifeByLogic}},
  title = {What Is the ASRS? The WHO Adult ADHD Self-Report Scale},
  year = {2026},
  month = {oct},
  publisher = {LifeByLogic},
  url = {https://lifebylogic.com/glossary/asrs-screener/},
  note = {Accessed: 2026-10-25}
}