Behaviour Change: Why It’s So Hard (And How to Make It Stick)

An organisation wants its employees to adopt a new way of working. Emails go out, meetings are scheduled, a training is organised. Six months later: nothing has changed. People understand the need, they even agree with it, but they’re not doing it. Behaviour change turns out to be stubbornly resistant in a way that surprises many organisations. And it has nothing to do with motivation or intelligence. It has everything to do with the wrong approach.

This article explains why behaviour change is so difficult, what the science tells us about how habits work, and which proven strategies actually lead to lasting behaviour change, in individuals and in organisations.

Why is behaviour change so difficult?

Most organisations and individuals approach behaviour change in the same way: they explain why the change is necessary, provide information, talk about the benefits, and hope that behaviour will follow. The problem is that this approach ignores how the brain actually works.

Daniel Kahneman, Nobel laureate and author of Thinking, Fast and Slow, described two thinking systems:

• System 1: fast, automatic, unconscious, emotional. Responsible for approximately 96% of our decisions.
• System 2: slow, deliberate, rational, analytical. Costly in terms of energy, deployed sparingly.

When you inform people about why they need to change, you engage System 2. But their behaviour, what they actually do, is driven predominantly by System 1. That is the first reason behaviour change is so hard: the approach targets the wrong system.

Two further powerful mechanisms make it even harder:

• Loss aversion: the brain registers loss roughly twice as strongly as an equivalent gain. Change inherently means giving something up: a familiar routine, a comfortable way of working, and that registers as loss. The new behaviour doesn’t just have to be better; it has to feel significantly better to overcome the resistance.
• Status quo bias: people have a strong preference for the current state of affairs, even when alternatives are objectively superior. The familiar approach has the advantage of the present; the new approach carries the uncertainty of the unknown.

Behaviour doesn’t change because people want it to. Behaviour changes when the environment changes.

This is the core principle of behavioural design: you cannot think people into new behaviour. You must guide them by structuring the context so that the new behaviour becomes the path of least resistance.

The science of habits

To understand behaviour change, you need to understand how habits work. Researcher Charles Duhigg described in The Power of Habit (2012) the so-called habit loop: the three-part cycle underlying every habitual behaviour.

1. Cue: a trigger that activates the behaviour: a time of day, a location, an emotion, another habit.
2. Routine: the automatic behaviour itself.
3. Reward: the satisfaction that the behaviour delivers, which causes the brain to repeat the loop.

Habits are deeply ingrained neural pathways. The more often a routine is performed, the stronger the pathway becomes and the less conscious guidance it requires. That is brilliant from an energy perspective, the brain can run on autopilot, but it makes habits remarkably resistant to change.

Research shows that more than 40% of our daily behaviour is habitual (Neal, Wood & Quinn, 2006). We are not making conscious choices; we are responding to cues. And that is precisely why willpower as a change strategy structurally fails: willpower is a System 2 resource that depletes. Habits run on System 1 and do not deplete.

You don’t change a habit by thinking harder about it. You change a habit by changing the cue or the routine.

And then there is the intention-action gap: the phenomenon where people genuinely want to change but don’t. People who want to stop smoking. People who want to eat more healthily. Employees who want to adopt the new way of working. The gap between intention and action is not filled by more motivation, it is filled by better behavioural design.

Understand first, then change: the SUE Influence Framework

Before you can design behaviour change, you need to understand why people do what they do. Not what they say they do, but what they actually do, and which unconscious forces drive that behaviour.

At SUE Behavioural Design, we use the SUE Influence Framework for this: a diagnostic model that identifies four forces that determine behaviour.

• Pains: the frustrations and pain points in current behaviour that motivate people to change.
• Gains: the benefits of new behaviour that attract people towards it.
• Comforts: the habits, routines and familiar patterns that keep people locked in old behaviour.
• Anxieties: the fears, doubts and uncertainties that block new behaviour.

The crucial insight: most change programmes focus on Pains and Gains, they explain why the change is needed and what the benefits are. But it is the Comforts and Anxieties that actually determine behaviour. Comforts are the habits that anchor people in current behaviour. Anxieties are the fears that block new behaviour.

You cannot change behaviour by working on the behaviour alone. You change behaviour by influencing the forces that drive it. Influence is much more like judo than karate: you work with the forces that already exist, not against them.

An example: an organisation wants employees to use a new digital collaboration tool more consistently. The gains are clear (more efficient, less email), but the comforts are stronger: email is familiar, always works and requires no new habits. And the anxieties are real: “What if I miss something?” “How does it work?” “What if I look incompetent?” Communicating about the benefits addresses the gains, but the comforts and anxieties remain untouched. The behaviour does not change.

5 proven strategies for behaviour change

Based on decades of behavioural science and our own practical experience with hundreds of organisations, these are the strategies that consistently work.

1. Remove friction from the desired behaviour

The most universal lesson from behavioural science: simplicity eats willpower for breakfast. If the new behaviour requires too many steps, demands too much thinking, or feels too uncomfortable, the brain will automatically revert to the familiar routine. The solution is not to push people harder, but to make the desired behaviour as easy as possible.

Amazon’s ‘one-click buying’ is the textbook example: conversion increased not through better arguments or higher discounts, but by removing every last piece of friction from the purchase process. The same principle applies to every behaviour change in organisations. Read more in our article on friction in Behavioural Design.

2. Make the desired behaviour the default

Defaults are one of the most powerful instruments in behavioural design. People overwhelmingly select the pre-chosen option, not because they make a conscious choice, but because changing requires effort and the default feels “good enough”. In countries with an opt-out system for organ donation, participation approaches 100%; in opt-in countries, it sits at just 20–27%. The same people, the same values, a different default.

In organisations: make the new behaviour the standard. Anyone who does not want to follow the new way of working must actively do something different. Whoever does nothing, does it right. Read more in our article on defaults explained.

3. Use commitment devices

A commitment device is a mechanism through which people bind themselves in advance to desired behaviour. The classic Odysseus strategy: knowing you will be weaker in the future than you are now, you restrict your future options. A savings account you cannot easily withdraw from. A public pledge that holds you to your word. An implementation intention (“When X, I will do Y”) that pre-links the cue and routine before the situation arises.

Commitment devices work because they harness the strength of the present moment, when motivation is high, to govern future behaviour. Read more in our article on commitment devices.

4. Make the unwanted behaviour harder

Behaviour change works best when you simultaneously remove friction from the desired behaviour and add friction to the unwanted behaviour. This is called sludge: deliberately creating barriers to unwanted behaviour. Not a prohibition, the behaviour remains possible, but it costs something extra. An extra click. An extra step. An extra deliberate choice that forces System 2 to engage.

Our article on sludge explained goes deeper on this.

5. Use social norms

Human beings are social animals. We automatically look at what others are doing as a signal for what is normal and appropriate. This makes social norms one of the most underrated instruments for behaviour change.

“96% of your colleagues have already done this” is more effective than any rational argument. Not because people are irrational, but because social information is a direct input to System 1. Making visible that the new behaviour is already the norm, even when the transition is still under way, dramatically accelerates adoption. Hotels that communicate “most guests in this room reuse their towels” see 26% higher towel reuse than hotels that communicate only about the environment.

Behaviour change in organisations

Organisational change almost always fails for the same reason: the programme targets attitudes, not behaviour. Leaders communicate the urgency, HR organises workshops, managers lead by example, and yet very little changes. Attitudes are not behaviour. You can convince someone of the importance of something without their behaviour changing. And conversely: behaviour changes regularly without anyone being convinced.

A fundamental principle we use at SUE: good people, bad circumstances. Employees who are not displaying the new behaviour are rarely unwilling or incompetent. They are operating in an environment that facilitates the old behaviour and obstructs the new one. The solution is not more communication or more training, the solution is redesigning the environment.

What actually works

• Diagnose the four forces before designing an intervention. What are the Comforts keeping people anchored in old behaviour? What are the Anxieties blocking the new behaviour?
• Change the context, not the person. Adapt processes, workflows, physical environments and digital interfaces so that the new behaviour is the easiest option.
• Make early adoption visible. Show who is already on board. Social norms act as a flywheel.
• Remove administrative barriers. Every extra step, every extra form, every extra approval is friction that slows or blocks behaviour.

A concrete example: an organisation that wants to adopt new project management software is better served by configuring the system as the sole channel for project communication (default + sludge on the old method) than by running a training day on the benefits of the system. Read more about engaging employees in change in our article engaging employees in change.

For HR professionals working on behaviour change, see also: behavioural design for HR and behavioural design for change management.

Conclusion: behaviour doesn’t change from the inside - it changes from the outside

The most enduring lesson from behavioural science is also the most counterintuitive: behaviour change has little to do with the people themselves and everything to do with the environment they are in. Informing people doesn’t work. Motivating people doesn’t work. Mandating change doesn’t work durably. What does work: structuring the environment so that the desired behaviour is the path of least resistance.

That requires a different approach. It starts with a thorough diagnosis: mapping the four forces that drive behaviour. It continues with strategic interventions: removing friction, redesigning defaults, activating social norms, deploying commitment devices. And it concludes with measurement: behaviour is visible and measurable, making it one of the rare domains where you actually know whether your intervention worked.

Want to learn how to design behaviour change professionally? In the Behavioural Design Fundamentals you learn step by step how to use the SUE Influence Framework to analyse behaviour, identify intervention opportunities, and design behaviour change that actually sticks. Further reading: change management guide, decision making: how to make better decisions, and why behavioural interventions fail.