Encyclopaedia — SUE Behavioural Design

Behavioural science from A to Z

The most important concepts, biases and techniques from behavioural science and the SUE Behavioural Design Method, clearly explained. Browse by category or search directly in all concepts. Happy learning!

Behavioural Design encyclopaedia — SUE
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Core Concepts

What is Behavioural Design?

The method that combines psychology and economics to understand and change human behaviour.

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Core Concepts

The SUE Influence Framework

The strategic model for systematically designing behaviour change, in five steps.

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Core Concepts

What is nudging?

Guiding behaviour subtly without restricting choices — the technique of Thaler and Sunstein.

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Core Concepts

System 1 and System 2

Two thinking systems compete for control: fast and automatic versus slow and rational.

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Core Concepts

Thinking Fast and Slow

The key ideas from Daniel Kahneman’s groundbreaking book on human decision-making.

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Core Concepts

Behavioural economics explained

The field that demonstrates people don’t decide rationally — and what you can do with that.

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Core Concepts

Decision science

The science that studies how decisions actually come about in the real world.

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Cognitive Biases

Cognitive biases at work: the complete guide

All 23 biases in one overview. Start here for the full picture.

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Cognitive Biases

Anchoring bias

The first number you hear shapes all your subsequent estimates.

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Cognitive Biases

Bandwagon effect

The more popular an idea, the more people adopt it — regardless of the facts.

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Cognitive Biases

Availability heuristic

What is easy to recall seems more important than it actually is.

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Cognitive Biases

Decision fatigue

The more decisions you make, the worse your next decision becomes.

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Cognitive Biases

Cognitive dissonance

The discomfort that arises when your behaviour conflicts with your beliefs.

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Cognitive Biases

Confirmation bias

We seek evidence that confirms our opinion and ignore what contradicts it.

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Cognitive Biases

Curse of knowledge

Once you know something, you can no longer imagine what it’s like not to know it.

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Cognitive Biases

Decoy effect

An unattractive third option suddenly makes one of the other two far more appealing.

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Cognitive Biases

Dunning-Kruger effect

The less you know, the more you think you know. Experts underestimate themselves.

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Cognitive Biases

Endowment effect

What you own feels more valuable than what you don’t yet have — even if they’re identical.

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Cognitive Biases

Framing effect

The same information leads to different decisions depending on how you present it.

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Cognitive Biases

Halo effect

One positive trait colours your judgement of someone’s entire personality.

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Cognitive Biases

Hindsight bias

In retrospect, everything seems predictable — but it wasn’t at the time.

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Cognitive Biases

Negativity bias

Negative experiences weigh more heavily than positive ones — up to five times as much.

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Cognitive Biases

Optimism bias

We overestimate the chance of success and systematically underestimate risks.

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Cognitive Biases

Peak-end rule

You don’t remember an experience as a whole, but by its peak moment and its ending.

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Cognitive Biases

Present bias

We always choose now at the expense of later — even when later is clearly better.

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Cognitive Biases

Reciprocity principle

When someone does something for you, you feel a strong urge to give something back.

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Cognitive Biases

Scarcity principle

The less available something is, the more valuable it seems — whether it’s scarce or not.

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Cognitive Biases

Social proof

We do what others do — especially when we’re uncertain.

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Cognitive Biases

Status quo bias

People prefer how things are now, even when change would be better.

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Cognitive Biases

Sunk cost fallacy

We keep investing in something that isn’t working, because we’ve already invested so much.

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Cognitive Biases

Loss aversion

Loss feels twice as strong as gain — and it drives virtually all your decisions.

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Techniques & Tools

Choice architecture

The way you present choices determines what people choose.

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Techniques & Tools

Defaults

Most people choose whatever is pre-selected — the most powerful nudge there is.

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Techniques & Tools

Commitment devices

Binding yourself in advance to a choice so your future self can’t back out.

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Techniques & Tools

Implementation intentions

An if-then plan that bridges the gap between good intentions and actual behaviour.

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Techniques & Tools

Friction in behavioural design

Sometimes you need to remove friction, sometimes add it — the difference determines whether it works.

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Techniques & Tools

Social norms

The behaviour of others is the most powerful lever for behaviour change at scale.

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Techniques & Tools

Sludge

Deliberate friction that makes it difficult for people to make good choices.

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Techniques & Tools

Dark patterns

Deceptive design that manipulates users into doing things they don’t want to do.

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Techniques & Tools

Libertarian paternalism

Helping people make better choices without restricting their freedom to choose.

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Techniques & Tools

Framing effect: examples

Concrete examples of how framing makes your communication more persuasive.

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Comparisons

BD vs Design Thinking

Both methods are human-centred, but they solve fundamentally different problems.

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Comparisons

BD vs Change Management

Change management focuses on processes; Behavioural Design focuses on the behaviour those processes depend on.

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Comparisons

BD vs UX Research

UX Research discovers what users want. Behavioural Design explains why they don’t do it.

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Comparisons

Behavioural economics vs Psychology

Behavioural economics focuses on economic decisions; psychology covers all human behaviour.

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Comparisons

Nudging vs Gamification

Nudging preserves freedom of choice; gamification motivates through game principles. Two approaches, different situations.

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By Sector

BD for Healthcare

Improving treatment adherence, encouraging healthier behaviour and enhancing the patient experience.

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By Sector

BD for Financial Services

Helping customers make better financial decisions — from saving to investing.

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By Sector

BD for Government

Making policy more effective by designing from how citizens actually make decisions.

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By Sector

BD for Retail

From store layout to pricing strategy: how purchasing behaviour is shaped.

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By Sector

BD for Education

Improving motivation, academic success and learning behaviour with behavioural insights.

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By Sector

BD for Tech

Designing products that align with how people actually think and act.

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By Sector

BD for Insurance

Simplifying complex choices and helping customers select the right cover.

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By Sector

BD for Telecoms

Reducing churn, improving onboarding and building customer loyalty with behavioural principles.

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By Sector

BD for FMCG

Understanding and influencing shelf behaviour, brand preference and impulse purchasing.

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By Sector

BD for Fintech

Digital financial products that align with the real decision-making behaviour of users.

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Learning Journeys

AI adoption in organisations

Why AI adoption fails at the behavioural layer — and how to design a learning journey that actually works.

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Learning Journeys

Culture change with behavioural science

Culture programmes change what people think, not what they do. How behavioural science bridges the gap from intention to consistent behaviour.

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Learning Journeys

Customer-centric transformation

Customer-centricity starts with employees, not customers. How behavioural design enables a genuine customer transformation.

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Learning Journeys

Change management with behavioural design

70% of change programmes fail not because of poor plans, but because they weren’t designed around how people actually change behaviour.

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Learning Journeys

Ownership in organisations

Ownership cannot be demanded — it must be designed. How managers use behavioural insights to create genuine autonomy and engagement.

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Learning Journeys

Work happiness in organisations

Work happiness doesn’t arise spontaneously — it is a design. The three levels at which you can structurally improve work happiness.

Astrid Groenewegen Read more →
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