About OpenScreener

Every screener carries a badge that tells you exactly what it is:

• Public domain / Validated · free licence. Published, peer-reviewed instruments whose owners have placed them in the public domain or made them free to use — for example PHQ-9, the CDC milestone checklists, SNAP-IV, the WHO ASRS, AQ-10 and PSC-17. These are reproduced with attribution and their published cut-offs, and each page links to the official source.
• OpenScreener original. Where the established tools are proprietary (SCQ, SRS-2, BRIEF-2, Vineland-3, Sensory Profile 2, DCDQ, CCC-2 and others), we wrote new instruments from scratch around the same publicly described constructs — usually the DSM-5-TR criteria themselves. Each page names the tools that inspired it. They share no items, norms, or scoring materials with those tools, are not affiliated with their publishers, and are licensed CC BY 4.0 so anyone can use, translate, and study them.
• Open task paradigm. Open implementations of long-established experimental procedures, such as the continuous performance task behind commercial attention tests.

Proprietary test items, norms, and manuals are protected by copyright, and publishing them would expose this project — and the clinicians using it — to legal risk that could take the whole commons offline. More importantly, a copied test without its norms and training is not the same test. The durable path to free screening is open instruments with open validation data, which is what the originals are designed to become.

Some tools are free but restrict electronic copies (for example M-CHAT-R/F and SDQ). We respect that and link to the authors’ own free online versions on the Landscape page.

The originals have thresholds set by expert judgement against DSM-5-TR criteria, not by population data. Until validation studies are done, their sensitivity and specificity are unknown. Use them as structured, criterion-mapped records of concern that support clinical judgement and referral — not as stand-alone decision rules. Validation studies, translations, and normative data contributions are the project’s top priority.

OpenScreener needs no account, but it does record how the site is used so we can monitor and improve it. We store:

• Screenings: which instrument was used, every answer, the score and result, the optional report details (patient initials or ID, who completed it, date), how long it took, and the country it was completed from.
• Visits: pages viewed, the referring site, approximate location (country, region, city), device and browser type, a random ID stored in your browser so repeat visits can be counted, and a one-way hash of your IP address. Raw IP addresses are not stored.
• Accounts (optional): if you sign up, your email address and the reports you choose to save. Sign-in codes are emailed through Resend. Saved reports are visible only to you, and you can delete them at any time.
• AI search: the description you type is sent to an AI model (Anthropic Claude) to suggest screeners, and the description and suggestions are stored.

This data is held in a private database that only OpenScreener administrators can access. Please use initials or a code rather than full names, and don’t type other identifying details. There are no advertising or third-party tracking cookies.

• Clinicians and researchers: help validate the originals, propose cut-offs from your data, or review items.
• Translators: instruments are plain data files, designed to be translated and culturally adapted.
• Rights holders: if you believe a listing or reproduction is inaccurate, contact us and we will correct it promptly.
• Developers: each instrument is one TypeScript file with its items and scoring logic — adding a new one is a single pull request.

OpenScreener provides screening tools for information and clinical support. It does not provide medical advice or diagnosis. Results should be interpreted by a qualified professional in the context of a full history and assessment. If you are worried about someone’s immediate safety, contact local emergency services.