Public sector design standards exist for a reason. Frameworks such as the GDS Design Principles help teams create services that are accessible, consistent and reliable, giving delivery teams a clear starting point and a shared sense of what good looks like. That matters in government, where standards help teams build with care and keep accessibility firmly in view.

But service design does not stop once a service meets a standard. Every service, screen or journey asks people to understand information, remember things, make decisions and take action. Once you start speaking to users and seeing how people actually move through a service, the picture becomes more complicated. A service can meet a standard and still feel hard to use.

Often, that comes down to context. People are rarely sitting down with a clear head and plenty of time. They might be rushing, distracted or already stressed about the reason they are there in the first place. Service design has to look more closely at the experience itself and not just whether the service meets a standard.

Understanding the mental effort behind using a service

When people use a service, they are doing more than reading a screen and clicking through a task. They are trying to take in information, work out what matters, hold details in mind and decide what to do next. That all takes mental effort.

One way to think about it is like a computer’s RAM. There is only so much information the brain can hold and process at once, and once you go past that point, things start to slow or break down.

That matters because people are not always using services at full capacity. They may be dealing with stress, distraction, time pressure or uncertainty about what happens next. Those things all affect how easily someone can understand information, remember what they need to do and complete a task.

A lot of that comes down to cognitive load, and how much the service is asking someone to process at once. In practice, that usually shows up through a few simple pressures:

  • How much someone needs to take in at once
    • How much they need to hold in mind as they move through the task
    • How much effort it takes to keep going and make sense of what comes next

In psychological terms, every interaction relies on a chain of cognitive processes. Someone has to notice what is in front of them, focus on the right thing, retrieve or hold information in memory and then decide what to do. People do not jump straight into action. They move through that chain, and our job as designers is to protect it.

The danger of the digital lift and shift

This thinking becomes especially visible when a paper service moves online. A common response is a digital lift-and-shift. Taking the same questions, structure and content from a paper form and placing them online with very little change to the experience.

A paper form might run to several pages, with dense questions and instructions. Staff may be used to helping people complete it, answering questions as they go. When teams are asked to digitise that process, the quickest solution can be to keep the same structure and place it all on one long page.

On the surface, the process has been digitised. But the experience for the person completing it may not have improved. In fact, it may have worsened.

Instead of moving through the form with support, they now need to scan a large amount of information on their own, work out what is relevant and keep track of where they are as they go. That affects several parts of the cognitive chain at once.

Cognitive process What it helps a user do What a digital lift-and-shift does
Perception Helps people recognise what they are looking at and understand the structure in front of them The structure becomes harder to read, so it is less obvious what needs attention
Attention Helps people focus on the right thing and filter out distractions Competing elements make it harder to focus on the right thing at the right time
Memory Helps people hold on to instructions and information while moving through the task People have to hold instructions in mind while answering questions and anticipating what comes next
Effort Affects how demanding the task feels and how much mental energy it takes to continue The whole task feels more demanding, especially on a small screen or when someone is already under pressure
Executive function Helps people plan, monitor progress and manage the task as a whole Without clear stages or structure, it becomes harder to judge what is left, what has been done and how to keep going

That is where lift-and-shift starts to backfire, what was meant to make the service more efficient can instead lead to drop off, mistakes and more support calls, especially for people with lower digital confidence or less support around them.

What a more cognitively informed design looks like

Once you start looking at a service through that lens, the redesign usually changes the structure of the journey, not just the look of the interface.

A redesign that respects those cognitive limits often includes choices like these:

Design choice Cognitive process supported What it helps a user do
One topic per screen Perception and attention Makes it easier to see what matters without competing information on the screen
Step by step flows Attention, memory and executive function Helps people focus on one action at a time and understand where they are in the journey
Upfront checklists Memory and effort Lets people prepare what they need before they begin, rather than trying to remember requirements as they go
Clear progress indicators Executive function, memory and effort Helps people judge what is left, pace themselves and decide whether they can keep going
Save and resume Effort and executive function Allows people to stop when they are interrupted or running out of time without losing their place
Clear visual hierarchy for labels, help text and actions Perception and attention Helps people recognise where to look first and understand the purpose of each part of the screen

Taken together, these choices make the journey easier to follow and less demanding to complete, which is often what separates a service that has simply been put online from one that has actually been designed around how people think and act.

System 1, System 2 and the ethics of influence

Making a service easier to follow is not only about reducing effort. It also affects how people make decisions as they move through the journey.

Some choices feel quick and obvious. Others make people stop, think and work things out. Behavioural science often describes this through two modes of thinking:

Mode How it works What it means for service design
System 1 Fast, automatic and intuitive Most of a service should feel clear enough to move through without constant effort
System 2 Slower, more deliberate and effortful Useful when a decision carries more risk or requires closer reflection

Good service design works with that default behaviour rather than against it. If a service forces people to stop, interpret and work things out at every step, it becomes tiring very quickly.

This is where nudges and sludge come in:

Pattern What it does Example
Transparent nudge Makes the next step easier to understand without hiding what is happening Highlighting a recommended option or showing clear guidance
Covert nudge Shapes behaviour without the user actively noticing Default settings or interface choices that quietly steer decisions
Protective friction Introduces effort at the right moment to reduce risk Confirmation steps before sending money or submitting sensitive information
Harmful sludge Adds friction that makes access harder than it needs to be Extra steps, repeated logins or confusing cancellation journeys

In public-facing services, transparent nudges are often the better ethical fit, because they support users without hiding the influence being applied, which matters even more when services are used by people who may already be under pressure or have lower digital confidence.

Designing for the ripple effect

The effect of these choices does not stop with a single interaction.

When we shape behaviour through structure, defaults, nudges or friction, we are not only affecting what someone does in that moment. We may also be shaping what happens next, and what repeated use of that service starts to create over time.

A nudge might make an action feel easier in the moment, but repeated use can also build habits. A sludge filled journey might not just delay one task. Over time, it can lead to avoidance, drop off or missed outcomes.

That is why second order effects matter. The question is not only whether a design works once, but what repeated use of that service is likely to lead to. If someone had to do this every day, what pattern would it create? What would start to feel easy? What would become difficult enough to avoid?

That is part of the responsibility that comes with design. We are not just deciding how something looks. We are shaping what feels easy, what feels hard and, in many cases, what people end up doing.

Designing with human capacity in mind

Public sector standards are an important part of good service design, they give teams a strong foundation and help make sure services are built with care. But they are only part of the picture.

Once you start looking closely at how people actually use services, it becomes clear that meeting a standard does not automatically make something easy to use. People bring stress, distraction, time pressure and uncertainty with them and those things shape how much information they can take in, how well they can hold on to it and how much effort they can give to the task in front of them.

That is why psychology and neuroscience matter here. It helps us understand what a service is really asking from someone, where that demand becomes too high and how design choices can either reduce that pressure or add to it.

Used well, that understanding leads to services that are not only accessible and consistent, but clearer, calmer and easier to move through. And in practice, that is often what makes the difference between a service that technically works and one that genuinely works for the people using it.

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