March

🚦 The Pedestrian Crossing Button — Control, but not always now

Pressing it feels essential.

🧠 UX Interpretation: Conditional participation

At a pedestrian crossing, the button appears to offer a simple exchange. Press it, and the traffic will stop. The system acknowledges your presence and responds.

Often, this is true. At quieter times the button directly triggers the signal change. The action matters.

But at busy junctions the lights are already running on fixed or adaptive cycles. Pressing the button may simply register a request that is already anticipated. The timing might not change at all.

The user participates in a system that is only partly responsive.

🎯 Theme: Control depends on context

Unlike the lift “close door” button, which is frequently disconnected, the crossing button usually remains functional. The difference is subtle but important.

The lift button often provides only the feeling of control. The crossing button provides real control, but only under certain conditions.

This creates an interesting experience. Users learn that pressing the button is the correct action, even though its effect varies.

The gesture persists because it is sometimes essential and always reassuring.

💡 UX Takeaways

• Systems can offer real control without guaranteeing immediate results.
• Users repeat actions that are occasionally effective.
• Consistency of behaviour matters more than consistency of outcome.
• Interfaces can combine function and reassurance.
• Context can change the meaning of an interaction.

📎 Footnote

Many pedestrian crossings operate differently depending on traffic conditions. At quieter times, pressing the button directly affects the signal sequence. At busier times, centralised traffic control systems may already be managing the lights, and the button simply confirms a request that would have been handled anyway.

📎 Footnote 2

Transport engineers sometimes note that people will press the button repeatedly, even after it has been registered. The action does not speed up the system, but not pressing it feels like a mistake.

⏳ The Progress Bar — Visible waiting

Movement makes waiting bearable.

🧠 UX Interpretation: Show activity, reduce anxiety

Computers often perform tasks that take time but provide no visible signs of progress. Early systems would simply freeze or display a static message. Users were left wondering whether anything was happening at all.

The progress bar solved this problem by turning waiting into something visible. A line fills, a circle spins, a percentage increases.

Even when the system does not know exactly how long the task will take, the interface shows movement.

🎯 Theme: Perception shapes experience

The progress bar does not always represent precise progress. It often estimates or stages movement to reassure the user.

Yet this small visual cue transforms the experience. Waiting with visible progress feels shorter than waiting without it.

The user is no longer idle. They are watching something unfold.

Design can change how time feels without changing time itself.

💡 UX Takeaways

• Visible feedback reduces uncertainty.
• Perceived progress can be as important as actual progress.
• Users tolerate waiting better when they understand it.
• Movement reassures more than static messages.
• Design can shape the experience of time.

📎 Footnote

Many progress bars are not strictly accurate. They may move quickly at first and slow later, or pause near completion while final tasks run. Designers often tune these behaviours to keep users engaged and prevent the impression that the system has stalled.

📸 The Camera Shutter Sound — Hearing the invisible

A digital camera that still clicks.

🧠 UX Interpretation: Feedback builds trust

Early digital cameras created a small problem. When a photograph was taken, almost nothing happened physically. There was no mechanical shutter, no film advancing, no reassuring sound.

Users felt uncertain. Had the picture actually been taken?

Manufacturers solved the problem with a curious design decision. They added a sound effect — a familiar camera click.

The sound did not correspond to any real mechanism. It simply confirmed that the action had occurred.

🎯 Theme: Sensory confirmation

The artificial shutter sound quickly became part of the digital photography experience. Smartphones inherited the same convention.

The sound acts as feedback. It marks the moment of capture and reassures the user that the device has responded.

Good interfaces often provide signals like this. When systems become invisible, design must invent new ways to make actions feel real.

💡 UX Takeaways

• Feedback reassures users that an action succeeded.
• Sensory cues can replace mechanical signals.
• Digital systems often imitate physical ones.
• Design should acknowledge human expectations.
• Sometimes a sound is as important as the function.

📎 Footnote

Many smartphones still include a shutter sound even though modern digital cameras do not require mechanical shutters. In some countries, such as Japan and South Korea, the sound cannot easily be disabled due to privacy concerns, ensuring that photographs are audibly signalled when taken.

🛗 The Lift Close Button — Control you probably don’t have

A button that calms impatience.

🧠 UX Interpretation: The illusion of participation

Step into a lift and one of the first instincts is to press the “close door” button. It feels efficient. Press the button, the doors close faster, and the journey begins.

Except in many modern lifts the button does absolutely nothing.

Door timing is usually controlled by the lift’s central system to meet safety regulations and accessibility rules. In many buildings the “close” button is disconnected or ignored during normal operation.

Yet the button remains.

Pressing it gives passengers a small feeling of control in a moment where they otherwise have none.

🎯 Theme: Interaction reduces frustration

Waiting is psychologically uncomfortable. Standing in a lift lobby with doors slowly closing can feel far longer than it actually is.

The button provides an outlet for that impatience. Even if the mechanism ignores the command, the action itself reassures the user that something has been attempted.

Design sometimes includes interactions not because they change the system, but because they change how people feel while using it.

💡 UX Takeaways

• Users value the feeling of control.
• Interaction can reduce perceived waiting time.
• Not every interface element must change the system.
• Psychological comfort is part of usability.
• Small gestures can calm impatient systems.

📎 Footnote

In the United States many lift “close door” buttons became non-functional after the Americans with Disabilities Act of 1990, which requires doors to remain open long enough for accessibility. In everyday operation the doors close according to programmed timing, regardless of how often the button is pressed.

📎 Footnote 2

Lift engineers sometimes joke that the most reliable part of the system is the passenger repeatedly pressing the button. In practice the lift is already preparing to move. The button mostly serves the human need to feel that something has been done about the wait.

🧁 The Cake Mix Egg — Participation improves acceptance

The egg that changed everything.

🧠 UX Interpretation: People want to feel involved

When instant cake mixes first appeared in the United States in the late 1940s they promised extraordinary convenience. The baker simply added water, mixed the powder, and baked.

But the products failed.

Market researchers discovered something surprising. Many home bakers felt uncomfortable serving a cake that required so little effort. It felt like cheating.

The manufacturers solved the problem with a small but brilliant change. They removed the powdered egg from the mix and altered the instructions.

“Add one fresh egg.”

Nothing fundamental changed in the chemistry of the cake. But psychologically everything changed. Cracking the egg created a moment of participation. The baker now felt responsible for the result.

🎯 Theme: Participation creates ownership

The cake mix did not become more efficient. In fact it required more work than before.

Yet sales increased dramatically.

The extra step restored a sense of authorship. The baker was no longer merely heating a product but contributing to its creation.

Good design sometimes adds a small action rather than removing it.

💡 UX Takeaways

• Convenience is not always the ultimate goal.
• Users often want to feel involved in the process.
• Small acts of participation create psychological ownership.
• Design should consider emotional experience as well as efficiency.
• Sometimes adding a step improves the product.

📎 Footnote

The cake mix story became a classic example in marketing and behavioural psychology. In early versions of the product, powdered eggs were included in the mix. When manufacturers removed them and asked customers to add a fresh egg themselves, sales increased dramatically. The additional step made the baker feel more involved in the creation of the cake.

🧂 The Blue Salt Twist — Participation in a packet

Seasoning became a choice.

🧠 UX Interpretation: Invite the user into the process

Early packets of crisps often contained a small blue paper twist filled with salt. The crisps themselves were unsalted. The eater opened the packet, unfolded the blue twist, and sprinkled salt to taste.

This simple design turned a finished product into a small ritual. The user completed the preparation. Some added all the salt. Others only a little. Children often poured the salt directly into their mouths before eating the crisps.

🎯 Theme: Interaction creates memory

The blue twist introduced a moment of agency. Eating was no longer purely passive. The eater made a decision and performed an action.

Later, manufacturers removed the twist and salted the crisps during production. The change improved efficiency and consistency. Yet something subtle disappeared. The small moment of participation vanished from the experience.

Design sometimes trades interaction for convenience.

💡 UX Takeaways

• Participation deepens engagement.
• Small rituals create lasting memories.
• User choice can exist even in simple products.
• Efficiency often replaces interaction.
• Design shapes not only use but experience.

📎 Footnote

Salt twists appeared in British crisp packets from the 1950s onward. They allowed manufacturers to ship plain crisps while letting customers control seasoning. The small blue paper sachet became a familiar feature of brands such as Smith’s before disappearing as production methods changed.

Bonus: The Search for the Salt Twist

It turns out that finding a photograph of the original crisp salt twist online is surprisingly difficult. Most modern images show small plastic sachets or foil packets, which completely miss the point. The classic version was a square of dark blue waxed paper containing a small pile of salt in the centre, with all four corners gathered together and twisted into a tiny bundle.

Midjourney proved oddly incapable of producing this simple object. Despite repeated prompt refinements, it kept generating sweet wrappers, tied candy bags, or elaborate sachets. In the end, the solution was a rather fitting piece of human-AI collaboration. By carefully describing the geometry of the paper — a square sheet, salt in the centre, all four corners twisted together into a single knot — and iteratively correcting the results, ChatGPT eventually produced an image that finally resembled the real thing.

Which feels strangely appropriate: the salt twist itself was an exercise in participation. The crisp manufacturer could easily have added the salt at the factory. Instead they invited the eater to finish the process. Even recreating its image required the same spirit of small but determined involvement.