Accessibility Research: How to Include Users with Disabilities in Your Studies

Accessibility research is the practice of intentionally including users with disabilities in your research process — not as an afterthought, but as a core part of understanding how your product works in the real world.

An estimated 1.3 billion people globally live with some form of disability — about 16% of the world's population, according to the World Health Organization. If your user research doesn't include them, you're making product decisions based on an incomplete picture. The features, flows, and interactions that work for your non-disabled users may be barriers for a significant portion of your actual user base.

More practically: inclusive research produces better products for everyone. Curb cuts were designed for wheelchair users but benefit parents with strollers, delivery workers with carts, and travelers with luggage. The same principle applies in software. Designing for accessibility reveals usability problems that affect all users, not just those with disabilities.

Why Most Research Programs Exclude Users with Disabilities

Accessibility research gaps aren't usually intentional — they're structural. Common barriers include:

Recruitment challenges. Standard recruitment panels skew toward highly digital-native, able-bodied participants. Reaching users with specific disabilities requires deliberate outreach through disability-focused communities, advocacy organizations, and specialized recruitment partners.

Method inflexibility. Many research methods assume participants can see a screen, use a mouse, speak clearly, or respond within a fixed time window. These assumptions exclude large populations.

Facilitation barriers. Live, moderated sessions can be cognitively and physically demanding for participants with certain disabilities. The presence of a moderator can also create anxiety that affects response quality.

Incentive and logistics friction. Research studies often require scheduling coordination, technical setup, and real-time availability — all of which create disproportionate burden for participants with mobility, cognitive, or chronic illness-related constraints.

Async AI interviews address many of these barriers structurally — which is one reason platforms like Koji have become valuable tools for inclusive research programs.

Types of Disabilities to Include in Research

Accessibility research should span the full range of disability types. Each group uses technology differently and has distinct research needs:

Visual impairments: Includes blindness, low vision, and color vision deficiency. These users rely on screen readers (NVDA, JAWS, VoiceOver), magnification, high-contrast modes, and keyboard navigation. Research should assess compatibility with these technologies.

Motor and physical impairments: Includes limited mobility, tremors, repetitive strain injuries, and paralysis. These users may rely on keyboard-only navigation, switch access, eye tracking, or voice control. Research reveals friction in interactions that require precise pointing or quick responses.

Cognitive and learning disabilities: Includes dyslexia, ADHD, autism spectrum conditions, traumatic brain injury, and memory impairments. Research reveals issues with complex navigation, dense text, time-pressured interactions, and inconsistent UI patterns.

Hearing impairments: Includes deafness and hard-of-hearing users who rely on captions, transcripts, and visual cues. Research reveals issues with audio-only information delivery.

Speech impairments: Includes conditions affecting verbal communication. These users may rely on alternative communication devices or text-based interfaces. Research reveals barriers in voice-required interactions.

Chronic illness and mental health conditions: Users with chronic fatigue, anxiety, depression, or episodic conditions have variable capacity and may need flexible, low-pressure research participation options.

Adapting Your Research Methods for Accessibility

Make Your Recruitment Accessible

Start before the first question is asked. Your screener, invitation email, and sign-up flow must themselves be accessible:

Screen your screener with a screen reader before sending it
Offer multiple ways to respond (email, phone, text, web form)
Explicitly state in your invitation that participants with disabilities are welcome and accommodations are available
Partner with disability advocacy organizations, assistive technology user communities, and accessible tech forums to reach participants outside your standard panel
Offer flexible scheduling and generous time windows — not everyone can do a rigid 45-minute slot on a weekday morning

Offer Flexible Participation Formats

Not every research method is accessible to every participant. Build flexibility into your study design:

Async interviews: Participants complete at their own pace, in their own environment, with their own assistive technology, at a time that suits them. This is the single highest-impact change you can make for inclusive research. Platforms like Koji deliver async AI interviews that work via text or voice — participants choose the mode that suits their needs and abilities.

Text-based options: For participants who find voice interactions difficult, text-based interviews remove the barrier of verbal communication. Koji's text interview mode lets participants type responses at their own pace, with no time pressure.

Voice options without real-time pressure: Async voice interviews (where participants record responses rather than speaking live) are more comfortable for many participants with speech anxiety, cognitive disabilities, or chronic fatigue than live moderated sessions.

Extended time: Always offer participants the ability to pause, resume, and take breaks during async studies. Live sessions should have built-in flexibility for breaks.

Adapt Your Interview Questions

For participants with cognitive or learning disabilities, apply plain language principles to your interview guide:

Use short sentences (aim for under 20 words per sentence)
Ask one question at a time
Avoid metaphors, idioms, and jargon
Define technical terms when they're unavoidable
Use concrete, specific language rather than abstract concepts

Koji's structured questions feature is especially useful here. You can break complex topics into discrete, digestible question types — a scale rating (1–5) followed by an open-ended "tell me more" — rather than presenting participants with a complex open question that requires holding multiple concepts in mind simultaneously.

Make Your Research Materials Accessible

Before running any session — live or async:

Ensure your interview platform is keyboard-navigable
Test with screen readers (VoiceOver on Mac/iOS, NVDA on Windows, TalkBack on Android)
Avoid requiring fine motor precision for interactions
Provide written transcripts of any audio or video content
Use sufficient color contrast in any visual materials
Don't rely on color alone to convey information

Recruiting Participants with Disabilities

Reaching participants with disabilities requires going beyond your standard panel:

Disability advocacy organizations: Many organizations in the blindness, deafness, autism, and physical disability communities are open to research partnerships. Reach out directly, explain your research goals, and offer meaningful incentives.

Assistive technology communities: Forums and communities organized around specific tools (screen reader users, AAC device users, wheelchair tech groups) are excellent recruitment channels. These communities often value research that might improve the products they rely on.

Specialized recruitment firms: Several research recruitment firms specialize in recruiting participants with disabilities. For studies where specific disability types are essential, these firms save significant time.

Your own user base: If your product already has users with disabilities, recruit from your existing user base. Send targeted invitations to users who have disclosed accessibility needs, used your accessibility features, or opted into accessibility-related communications.

Disability employment organizations: Organizations that support people with disabilities in the workforce often have established networks and community trust, making them effective recruitment partners.

Conducting the Research: Key Principles

Ask, don't assume. Never assume what accommodations a participant needs. Ask in advance: "Are there any accommodations that would help you participate comfortably?" Then follow through.

Respect participant expertise. People with disabilities are experts in their own experience. Approach interviews as a learner, not a problem-solver. Your job is to understand, not to fix.

Use people-first or identity-first language according to participant preference. Some communities prefer "person with a disability" (people-first); others prefer "disabled person" (identity-first, common in Deaf and autistic communities). When in doubt, follow the participant's lead.

Build in more time. Accessible research sessions often take longer. Build this into your project timeline and never rush a participant.

Compensate fairly. Participation in research takes time and effort that may be disproportionately taxing for participants with certain disabilities. Compensation should reflect this.

Protect privacy. Disability status is sensitive personal information. Treat accessibility data with the same care as any other sensitive data. Obtain explicit consent before recording, storing, or sharing information about participants' disabilities.

Analyzing Accessibility Research Data

Accessibility research data is qualitative by nature. Analysis approaches include:

Task analysis: For usability-focused accessibility research, record which tasks participants completed, where they struggled, and what workarounds they developed. Map findings to specific UI elements or interaction patterns.

Severity rating: Not all accessibility barriers are equal. Rate findings by frequency (how many participants encountered it), impact (how severely it affected task completion), and persistence (whether it blocked participants entirely or just slowed them).

Thematic analysis: For attitudinal and experience-focused research, use thematic analysis to identify patterns across participant narratives. Koji automatically surfaces themes from interview data, making cross-participant pattern recognition fast even with smaller sample sizes.

Comparison with non-disabled participants: Where possible, compare findings from participants with and without disabilities. Differences reveal accessibility-specific barriers; similarities reveal general usability problems.

How Koji Supports Accessible Research

Koji's platform has structural features that make it well-suited for accessibility research:

Async format removes real-time pressure, letting participants engage when their capacity is highest
Text and voice modes give participants agency over how they communicate
No moderator presence removes the social pressure that can be taxing for participants with anxiety or communication-related disabilities
Flexible session duration means participants can pause and return without losing progress
Automatic transcription creates a text record of voice interviews for participants who want to review or correct their responses
AI follow-up questions probe naturally, reducing the cognitive load of figuring out what to say next

For teams serious about inclusive research, Koji makes it practical to run accessible studies as a matter of course — not just for dedicated accessibility projects.

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Accessibility Research: How to Include Users with Disabilities in Your Studies