What cognitive accessibility covers
Cognitive accessibility is about how easily people can understand, remember and use an interface. It matters for visitors with learning disabilities, memory conditions, attention differences, brain injuries and many other situations. It also applies to a tired parent, a visitor reading in a second language, or someone who simply has never used a touchscreen like this one. Design that reduces mental effort tends to help nearly everyone.
The needs vary a great deal from person to person, so there is no single formula. The aim is to lower the number of things a visitor has to remember, decode or guess.
Reduce memory load
Interactive exhibits often ask visitors to hold information in mind that could simply be shown on screen. Some ways to avoid that:
- Keep important information visible. If a task has three steps, show which step the visitor is on and what comes next, instead of expecting them to remember.
- Recognition beats recall. Show options as labeled buttons rather than expecting a visitor to remember a command or a gesture.
- Do not make people carry information across screens. If a choice made earlier matters later, repeat it on the later screen.
- Avoid long sequences. Break a large activity into short, self-contained pieces with a clear end point.
Keep menus shallow and labels clear
Deep menu trees are a frequent cause of confusion. Visitors often tap into a section, cannot see how they got there, and give up. A few habits help:
- Offer a small number of top-level choices, often fewer than seven, and group related items logically.
- Use plain, specific labels that describe what the visitor will get, such as “Maps of the harbor” rather than a clever theme name.
- Pair text with an icon only when the icon is widely understood, and never use an icon without a label.
- Keep the same layout, button positions and wording on every screen so the interface can be learned once.
- Provide an obvious “Home” or “Start again” control in the same place throughout.
Because people read a screen from the top and from the left in many languages, put the most important actions where the eye lands first. If your exhibit supports several languages, keep the layout the same across them; our note on language switching covers how to avoid disorienting changes.
Avoid hidden controls and tricky gestures
Gestures such as swiping from the edge, pinching or double-tapping may be second nature for some people and unknown to others. If a gesture is needed, add a visible button alternative. Controls that appear only on hover or after a long press are particularly easy to miss. Wherever possible, a single tap should do the job in touchscreen exhibits. Large, well-spaced buttons also reduce accidental taps, a point developed further in the discussion of touch targets.
Remove time pressure
Time limits can make an exhibit unusable for people who read slowly, need time to think, or have a motor or cognitive difference. Avoid timed questions, auto-advancing slides and messages that vanish after a few seconds. If a time-out is unavoidable, for example to reset a shared kiosk, warn the visitor first and give a clear way to extend the time. The same logic applies to animation and moving content: unneeded motion draws attention away from the task, and auto-playing video with sound can interrupt thinking.
Give feedback and forgive mistakes
People want to know whether their action worked. A button should visibly respond, a loading state should say that something is happening, and a finished task should say that it is finished. Mistakes should be easy to undo:
- Offer a back button that goes where the visitor expects.
- Ask for confirmation before a step that cannot be reversed, and explain it in plain words.
- Write error messages that say what happened and what to do next, without blame.
Write for understanding
The words on screen affect cognitive load as much as the layout. Use short sentences, common words and one idea per paragraph, and explain unfamiliar terms when they first appear. The same principles apply to label text, which we cover in the article on plain language. Break up long text with headings and give each screen a single, clear purpose.
Be careful with attention-grabbing design
Flashing elements, busy backgrounds, competing animations and a cluttered screen make it harder to focus. Idle screens that loop dramatic visuals can draw visitors in, but the first interactive screen should be calm and give one clear starting action. How an attract loop hands over to the exhibit is discussed in our piece on attract screens.
Work with people who know
Autistic visitors and others with learning or attention differences, and people who work with them, can point to features that help and ones that frustrate. Our article on neurodivergent visitors discusses the audience in more depth, and many older adults will also appreciate simpler paths and slower pacing.
The most reliable method is to watch real people use the exhibit. Prototype testing with a mix of ages and abilities usually shows where the path breaks down, such as a button nobody notices or a menu name nobody understands. Fixing those points before installation costs far less than adjusting a finished exhibit.