Cogni.Dx Accessibility Statement

Last updated: 1st December, 2025

Our commitment

Cogni.Dx is designed specifically for people with memory and thinking difficulties, including dementia and mild cognitive impairment (MCI), as well as their carers and clinicians.

We are committed to making our digital assessment tools and websites accessible and usable for as many people as possible, and we design our interface in line with:

• Web Content Accessibility Guidelines (WCAG) 2.1, aiming for Level AA as a minimum and AAA for key body text where possible
• Dementia-specific digital design guidance from expert organisations
• Evidence-based UX research and user testing conducted with people affected by dementia and older adults

This statement applies to:

• The Cogni.Dx web portal (for patients, carers and clinical users)
• Any web-based assessment links sent to patients and carers

Evidence-based, dementia-focused design

Cogni.Dx's interface has been deliberately designed and iterated based on user testing with people affected by dementia and older adults, and on published research:

Colour & contrast

• People with dementia can have reduced contrast sensitivity and difficulty distinguishing certain colours, particularly blue hues. We therefore use high-contrast combinations and plain backgrounds, with all colours chosen to meet WCAG 2.1 AA contrast requirements as a minimum, and main body text meeting AAA.
• Brand colours (purple and blue) are combined with strong contrast and are never the sole indicator of meaning; icons, text and shapes reinforce colour cues.

Typography & readability

• We use Heebo, a clean sans-serif font selected for digital legibility, consistent with dementia-friendly typography guidelines (larger, high-contrast sans-serif fonts and minimal font variety).
• Text sizes follow WCAG guidance on "large text" (18pt+ or 14pt bold), allowing slightly lower contrast ratios for headings while keeping body text at higher contrast.
• Language is simplified to use familiar, everyday words and avoid jargon wherever possible, to reduce cognitive load.

Layout, navigation & interaction

• People with dementia can struggle with scrolling, orientation and task sequencing. In internal testing, all participants experienced difficulty with scrolling, so Cogni.Dx is designed with screen-by-screen layouts and no vertical scrolling within core workflows.
• Navigation remains visible across screens, with clear home routes, descriptive headings and predictable layouts, following dementia-specific design recommendations and UX best practices (e.g. Jakob's Law, Hick's Law).
• At least 40% of tested users reported difficulty with small buttons; we therefore use a minimum interactive target size of 44×44pt, in line with Apple's Human Interface Guidelines and Fitts's Law, to make buttons easier to see and tap.

Language, help & privacy clarity

• Wording throughout the platform is written in plain, dementia-positive language and simplified where testing showed that complex terminology created confusion.
• The help section provides both audio and text (not audio-only), after testing showed some users struggled to follow audio content on its own.
• A clearly visible privacy / GDPR link is included in the footer of all pages, reflecting feedback from users who wanted easy access to information about how their data is used.

Overall, the design emphasises high contrast, simple layouts, large touch targets and plain language to reduce visual strain, memory load and confusion for users with cognitive impairment.

How accessible Cogni.Dx is

We want users to be able to:

• Navigate key patient and clinician workflows using a keyboard
• Use screen readers with core screens, including question pages and main navigation
• Resize text and zoom in up to 200% without loss of content or functionality
• Use the system on modern browsers and devices, including mobiles and tablets
• See sufficient colour contrast between text, interface elements and backgrounds
• Understand what they need to do thanks to clear headings, labels, step-by-step flows and simple language

Because we removed scrolling from core flows, users complete tasks step-by-step, reducing the risk of losing their place on long pages. Large, high-contrast buttons and widgets are used for important actions and answer choices, supporting users with reduced dexterity, vision or attention.

Content that may not be fully accessible

We know that some parts of Cogni.Dx may not yet be fully accessible, such as:

• Certain charts, graphs or score visualisations that may not include complete text or tabular alternatives
• Older PDF or document downloads that may not be fully tagged for screen readers
• Some timed cognitive tasks that could be challenging for users who require more time or additional input methods
• Some third-party components (e.g. embedded videos, analytics tools) that may not fully meet WCAG standards, although we try to select accessible options where possible

We are working to improve these areas and welcome feedback on specific barriers you encounter.

If you cannot access part of the service

If you need information from Cogni.Dx in a different format, or you cannot complete an assessment because of an accessibility issue, please contact us and (where possible) tell us:

• The page or screen you were on
• What you were trying to do
• The assistive technology, browser and device you were using

You can contact us via:

Email: support@cognidx.co.uk

Where reasonable, we will:

• Provide information in an alternative format (for example, large print, accessible PDF, clinician-led alternative assessment or summary), and/or
• Work with your healthcare provider or research team to find an accessible way for you to complete the assessment.

We aim to respond to accessibility queries within 2 working days.

Reporting accessibility problems

We are always looking to improve the accessibility of Cogni.Dx.

If you find any accessibility problems not listed on this page, or you think we are not meeting accessibility requirements, please contact:

Email: support@cognidx.co.uk

Subject line: "Accessibility issue – Cogni.Dx"

If you are accessing Cogni.Dx through a hospital, clinic, NHS trust or university, you may also contact your local provider's accessibility or patient experience team, who will have their own accessibility statement and complaint routes.

Technical information about Cogni.Dx's accessibility

Cogni.Dx is designed to be compatible with:

• The latest versions of major browsers (e.g. Chrome, Edge, Safari, Firefox)
• Current versions of common screen readers and operating systems
• Desktop, laptop and modern mobile devices with internet access

Cogni.Dx may not work as intended on:

• Very old browsers that are no longer supported by the vendor
• Devices or configurations where JavaScript is disabled
• Browsers or assistive technologies that do not support modern web standards (HTML5, ARIA, etc.)

Our UX and engineering teams use WCAG 2.1 Level AA as a key reference, alongside dementia-specific UX research, to guide design and development decisions.

How we're improving accessibility

Based on ongoing research and testing, we are:

• Continuously reviewing colour contrast, typography and interactive target sizes to ensure they meet or exceed WCAG 2.1 AA
• Keeping navigation structures simple, familiar and consistent across new features
• Adding and refining text alternatives for icons, images and visual indicators, and providing more accessible formats for downloadable documents
• Enhancing keyboard navigation and focus order for core workflows
• Embedding accessibility and dementia-friendly design checks into our design, development and testing processes

This statement will be updated as we make further improvements and as accessibility standards and legal requirements evolve.