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Behavioural Science Thinking Frameworks

Evidence-based frameworks on how people actually decide, form habits, and change behaviour — captured as .md skill files for Claude, ChatGPT, and any LLM.

Most people think they are more rational than they are, and the costs of that error compound. The researchers in this collection spent careers documenting the gap — not to humiliate their subjects but to design better choices, habits, and institutions around it. Daniel Kahneman and Amos Tversky ran decades of experiments showing that judgement under uncertainty is systematically biased in predictable ways; their collaboration produced a body of work with no serious rival in applied psychology. Richard Thaler took those findings into economics and policy, helping design the opt-out pension systems that now save retirement for millions who would never opt in. Robert Cialdini mapped the six levers of influence with enough clinical precision that the same book is used by ethical designers and by people who should know better. Carol Dweck's growth mindset research started in children's praise studies and ended up reshaping how schools and companies think about talent. BJ Fogg's Tiny Habits framework is the clearest procedural account of how lasting behaviour change actually works. Use this collection when designing a product decision, changing a personal habit, building a persuasion-aware communication, or understanding why people consistently ignore what is good for them.

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Signature mental models

How behavioural sciences think

  • System 1 and System 2identify which mode is running before you trust the output; fast intuition is reliable in its domain and dangerous outside it
  • Choice architecturethe structure of the choice changes the choice; defaults, sequencing, and framing are decisions whether you treat them as such or not
  • Fixed versus growth mindsettalent is a story you tell about effort; the story determines how much effort gets applied next time
  • Tiny habitsattach the behaviour to an existing anchor, make it small enough to be certain, then celebrate immediately; motivation follows consistency rather than producing it
  • The six principles of influencereciprocity, commitment, social proof, authority, liking, and scarcity operate before conscious deliberation; knowing the mechanism is the first defence against it

Frameworks in this category

Practical use

When to use these frameworks

  • Designing a product, policy, or communication where the default behaviour matters as much as the stated option
  • Diagnosing why a change programme is failing when the logic seems sound and the motivation seems present
  • Understanding how a particular decision is being distorted by cognitive bias before it is made
  • Building a personal habit that has to work without depending on willpower every day
  • Reviewing a persuasion strategy for the ethical line between influence and manipulation
Featured framework

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Daniel Kahneman

System 1, System 2 & Cognitive Bias

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Related categories

Adjacent thinking

FAQ

Frequently asked questions

Which behavioural science framework is best for someone new to the field?

Start with Kahneman and Cialdini. Kahneman's System 1/System 2 framework gives you a vocabulary for the most common reasoning errors — anchoring, availability bias, loss aversion — that applies immediately in product, investment, and negotiation work. Cialdini's six principles of influence give you a map of the levers in any persuasion context, and knowing the mechanisms makes you harder to manipulate regardless of whether you plan to use them.

Can this replace a therapist or clinical professional?

No. These frameworks describe how normal psychological processes work at a population level; they are not diagnostic tools, treatment plans, or substitutes for clinical care. Viktor Frankl's logotherapy and Brené Brown's vulnerability work are useful frameworks for self-reflection and communication, but they do not constitute therapy. If you are dealing with a clinical condition — depression, anxiety, trauma — please work with a qualified professional. These files are for cognitive and behavioural self-awareness, not clinical support.

Is nudge theory manipulative?

The serious version of the question is whether choice architecture that changes behaviour without explicit persuasion respects autonomy. Thaler and Sunstein's answer is that you cannot avoid designing choice architecture — any default is a choice — so the question is whether you design it with the person's interests in mind or against them. The frameworks here are built around the former: transparent defaults, opt-out rather than lock-in, and matching the decision context to what people actually want when they think carefully. Using these frameworks to obscure costs or exploit cognitive biases is a different and indefensible thing.

Are these useful for teams and organisations, or only for individual decision-making?

Both. The individual frameworks (Dweck's mindset work, Fogg's habit design, Frankl's meaning under constraint) apply to personal practice. The structural frameworks (Thaler's choice architecture, Kahneman's pre-mortem, Cialdini's influence principles) apply directly to organisational decisions — how you set defaults in a product, how you structure a performance review, how you design the opt-in for a policy. Jonathan Haidt's moral foundations work is particularly useful for teams that need to understand why people with identical information reach opposite conclusions.

Do these frameworks work across cultures?

The core cognitive effects (anchoring, loss aversion, representativeness) have been replicated widely, though effect sizes vary. The social influence principles (Cialdini) and moral foundations (Haidt) show more cultural variation — what counts as authority or fairness differs significantly across contexts. Use these frameworks as starting hypotheses that need local validation rather than universal rules. Elizabeth Loftus's memory work and Amos Tversky's probability research are the most culturally robust; social-norm-based work needs more contextual care.

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