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General Questions

The RAADS-R (Ritvo Autism Asperger Diagnostic Scale, Revised) is a validated 80-item screening questionnaire designed to assist in identifying autism spectrum disorder in adults. It evaluates traits across four domains: Social Relatedness, Circumscribed Interests, Language, and Sensory Motor.See the Clinical Background page for detailed information.
No. The RAADS-R is a screening tool, not a diagnostic instrument. Results should be discussed with a qualified healthcare professional who can provide a comprehensive assessment. Only a trained clinician can diagnose autism spectrum disorder.
The RAADS-R is designed for adults (18+ years) who want to explore whether they have autism-related traits. It can be used for self-reflection, to prepare for a clinical evaluation, or as part of a research study. It should not be used as the sole basis for self-diagnosis.
Most users complete all 80 questions in 15-30 minutes. You can save your progress at any time and return later if needed.

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Privacy & Data

Yes. All data stays in your browser. This application:
  • Runs entirely offline once loaded
  • Does not send any data to external servers
  • Does not use cookies or analytics
  • Does not track you in any way
Your responses are only stored locally if you explicitly enable the “Save Progress” feature.
The “Save Progress” feature uses your browser’s localStorage to save your responses. This is:
  • Opt-in only: You must explicitly enable it
  • Local only: Data never leaves your device
  • Deletable: Use the “Delete My Data” button to clear all saved data at any time
  • Browser-specific: Saved data is only accessible in the same browser on the same device
Yes. You can export your results in three formats:
  • JSON: Machine-readable format containing all responses and scores
  • CSV: Spreadsheet format with responses and domain scores
  • PDF: Print-friendly format with full results and clinical interpretation
All exports are generated locally in your browser.
If you clear your browser’s localStorage, any saved progress will be permanently deleted. If you want to preserve your responses, export them before clearing browser data.

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Using the Application

No. All 80 questions must be answered to generate valid results. This ensures accurate scoring according to the clinical methodology. You can save your progress and return later if you need a break.
Yes. You can navigate back to any question and change your response before viewing results. Once you view results, you can retake the questionnaire if desired.
The RAADS-R uses four response options:
  • True now and when I was young: The statement applies to you currently and also applied during childhood
  • True only now: The statement applies to you currently but did not apply during childhood
  • True only when I was younger than 16: The statement applied during childhood but does not apply currently
  • Never true: The statement has never applied to you
Yes. Once the page has loaded, the application works completely offline. You can disconnect from the internet and continue using it without any issues.
Yes. The application supports both dark and light modes. It will automatically match your system preference, and you can manually toggle between modes using the theme switcher.

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Scoring & Results

Each question is scored 0-3 points based on your response. The application automatically:
  • Sums scores for each of the four domains
  • Calculates the total score (sum of all domains)
  • Applies reverse scoring to 17 normative items
  • Compares scores to clinical thresholds
See the Scoring Methodology page for details.
Scores above the clinical thresholds suggest the presence of autism-related traits:
  • Social Relatedness: >30
  • Circumscribed Interests: >14
  • Language: >3
  • Sensory Motor: >15
  • Total: >65
However, only a qualified healthcare professional can interpret these results in the context of a comprehensive assessment.
Yes. This implementation:
  • Uses the exact question wording from the published RAADS-R
  • Applies the official scoring methodology
  • Correctly reverse-scores all 17 normative items
  • Has been validated with 62 automated tests
  • Cross-validates results using two independent scoring engines
See the Testing page for validation details.
Scoring below the clinical thresholds suggests you may not have clinically significant autism-related traits. However, the RAADS-R is not perfect and can produce false negatives. If you have concerns about autism, discuss them with a healthcare professional regardless of your score.

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Technical Questions

Yes. This is a self-hosted application. You can:
  • Download and run it on your own server
  • Run it locally on your computer
  • Deploy it to any static hosting service
See the Quickstart guide for deployment instructions.
The application is built with:
  • React 19 with TypeScript
  • Vite for build tooling
  • Tailwind CSS v4 for styling
  • Vitest for testing (62 tests)
See the Architecture page for details.
Yes. The source code is available under the CC BY-NC 4.0 license. You can modify it for non-commercial purposes. See the Customization and Attribution pages for details.
Please open an issue on the GitHub repository. Include details about your browser, operating system, and steps to reproduce the issue.

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Accessibility

Yes. The application includes:
  • Full keyboard navigation support
  • Screen reader compatibility
  • Reduced motion support for users with vestibular disorders
  • High contrast support in both light and dark modes
  • Semantic HTML structure
Yes. You can navigate the questionnaire entirely with the keyboard:
  • Tab/Shift+Tab: Move between questions and options
  • Arrow keys: Select response options
  • Space/Enter: Confirm selection
  • Page Up/Down: Navigate between pages (if implemented)

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