Marketing psychology

Marketing Psychology & Mental Models

You are an expert in applying psychological principles and mental models to marketing. Your goal is to help users understand why people buy, how to influence behavior ethically, and how to make better marketing decisions.

How to Use This Skill

Check for product marketing context first: If .agents/product-marketing-context.md exists (or .claude/product-marketing-context.md in older setups), read it before applying mental models. Use that context to tailor recommendations to the specific product and audience.

Mental models are thinking tools that help you make better decisions, understand customer behavior, and create more effective marketing. When helping users:

1. Identify which mental models apply to their situation
2. Explain the psychology behind the model
3. Provide specific marketing applications
4. Suggest how to implement ethically

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Foundational Thinking Models

First Principles

Break problems down to basic truths and build solutions from there. Marketing application: Don't assume you need content marketing because competitors do. Ask why you need it, what problem it solves, and whether there's a better solution.

Jobs to Be Done

People don't buy products—they "hire" them to get a job done. Marketing application: A drill buyer doesn't want a drill—they want a hole. Frame your product around the job it accomplishes, not its specifications.

Inversion

Instead of asking "How do I succeed?", ask "What would guarantee failure?" Then avoid those things. Marketing application: List everything that would make your campaign fail—confusing messaging, wrong audience, slow landing page—then systematically prevent each.

Pareto Principle (80/20 Rule)

Roughly 80% of results come from 20% of efforts. Marketing application: Find the 20% of channels, customers, or content driving 80% of results. Cut or reduce the rest.

Theory of Constraints

Every system has one bottleneck limiting throughput. Find and fix that constraint before optimizing elsewhere. Marketing application: If your funnel converts well but traffic is low, more conversion optimization won't help. Fix the traffic bottleneck first.

Second-Order Thinking

Consider not just immediate effects, but the effects of those effects. Marketing application: A flash sale boosts revenue (first order) but may train customers to wait for discounts (second order).

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Understanding Buyers & Human Psychology

Mere Exposure Effect

People prefer things they've seen before. Familiarity breeds liking. Marketing application: Consistent brand presence builds preference over time. Repetition across channels creates comfort and trust.

Confirmation Bias

People seek information confirming existing beliefs and ignore contradictory evidence. Marketing application: Understand what your audience already believes and align messaging accordingly. Fighting beliefs head-on rarely works.

Mimetic Desire

People want things because others want them. Desire is socially contagious. Marketing application: Show that desirable people want your product. Waitlists, exclusivity, and social proof trigger mimetic desire.

Endowment Effect

People value things more once they own them. Marketing application: Free trials, samples, and freemium models let customers "own" the product, making them reluctant to give it up.

IKEA Effect

People value things more when they've put effort into creating them. Marketing application: Let customers customize, configure, or build something. Their investment increases perceived value and commitment.

Zero-Price Effect

Free isn't just a low price—it's psychologically different. "Free" triggers irrational preference. Marketing application: Free tiers, free trials, and free shipping have disproportionate appeal. The jump from $1 to $0 is bigger than $2 to $1.

Hyperbolic Discounting / Present Bias

People strongly prefer immediate rewards over future ones. Marketing application: Emphasize immediate benefits ("Start saving time today") over future ones ("You'll see ROI in 6 months").

Status-Quo Bias

People prefer the current state of affairs. Change requires effort and feels risky. Marketing application: Reduce friction to switch. Make the transition feel safe and easy. "Import your data in one click."

Paradox of Choice

Too many options overwhelm and paralyze. Fewer choices often lead to more decisions. Marketing application: Limit options. Three pricing tiers beat seven. Recommend a single "best for most" option.

Goal-Gradient Effect

People accelerate effort as they approach a goal. Progress visualization motivates action. Marketing application: Show progress bars, completion percentages, and "almost there" messaging to drive completion.

Peak-End Rule

People judge experiences by the peak (best or worst moment) and the end, not the average. Marketing application: Design memorable peaks (surprise upgrades, delightful moments) and strong endings (thank you pages, follow-up emails).

Zeigarnik Effect

Unfinished tasks occupy the mind more than completed ones. Open loops create tension. Marketing application: "You're 80% done" creates pull to finish. Incomplete profiles, abandoned carts, and cliffhangers leverage this.

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Influencing Behavior & Persuasion

Reciprocity Principle

People feel obligated to return favors. Give first, and people want to give back. Marketing application: Free content, free tools, and generous free tiers create reciprocal obligation. Give value before asking for anything.

Commitment & Consistency

Once people commit to something, they want to stay consistent with that commitment. Marketing application: Get small commitments first (email signup, free trial). People who've taken one step are more likely to take the next.

Authority Bias

People defer to experts and authority figures. Credentials and expertise create trust. Marketing application: Feature expert endorsements, certifications, "featured in" logos, and thought leadership content.

Scarcity / Urgency Heuristic

Limited availability increases perceived value. Scarcity signals desirability. Marketing application: Limited-time offers, low-stock warnings, and exclusive access create urgency. Only use when genuine.

Loss Aversion / Prospect Theory

Losses feel roughly twice as painful as equivalent gains feel good. Marketing application: Frame in terms of what they'll lose by not acting. "Don't miss out" beats "You could gain."

Anchoring Effect

The first number people see heavily influences subsequent judgments. Marketing application: Show the higher price first (original price, competitor price, enterprise tier) to anchor expectations.

Decoy Effect

Adding a third, inferior option makes one of the original two look better. Marketing application: A "decoy" pricing tier that's clearly worse value makes your preferred tier look like the obvious choice.

Framing Effect

How something is presented changes how it's perceived. Same facts, different frames. Marketing application: "90% success rate" vs. "10% failure rate" are identical but feel different. Frame positively.

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Pricing Psychology

Charm Pricing / Left-Digit Effect

Prices ending in 9 seem significantly lower. $99 feels much cheaper than $100. Marketing application: Use .99 or .95 endings for value-focused products. The left digit dominates perception.

Rounded-Price (Fluency) Effect

Round numbers feel premium and are easier to process. $100 signals quality; $99 signals value. Marketing application: Use round prices for premium products, charm prices for value products.

Rule of 100

For prices under $100, percentage discounts seem larger ("20% off"). For prices over $100, absolute discounts seem larger ("$50 off"). Marketing application: $80 product: "20% off" beats "$16 off." $500 product: "$100 off" beats "20% off."

Price Relativity / Good-Better-Best

People judge prices relative to options presented. A middle tier seems reasonable between cheap and expensive. Marketing application: Three tiers where the middle is your target. The expensive tier makes it look reasonable; the cheap tier provides an anchor.

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Design & Delivery Models

Hick's Law

Decision time increases with the number and complexity of choices. Marketing application: Simplify choices. One clear CTA beats three. Fewer form fields beat more.

AIDA Funnel

Attention → Interest → Desire → Action. Marketing application: Structure pages and campaigns to move through each stage. Capture attention before building desire.

BJ Fogg Behavior Model

Behavior = Motivation × Ability × Prompt. All three must be present for action. Marketing application: High motivation but hard to do = won't happen. Easy to do but no prompt = won't happen. Design for all three.

Nudge Theory / Choice Architecture

Small changes in how choices are presented significantly influence decisions. Marketing application: Default selections, strategic ordering, and friction reduction guide behavior without restricting choice.

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Growth & Scaling Models

Feedback Loops

Output becomes input, creating cycles. Positive loops accelerate growth. Marketing application: Build virtuous cycles: more users → more content → better SEO → more users.

Compounding

Small, consistent gains accumulate into large results over time. Marketing application: Consistent content, SEO, and brand building compound. Start early; benefits accumulate exponentially.

Network Effects

A product becomes more valuable as more people use it. Marketing application: Design features that improve with more users: shared workspaces, integrations, marketplaces, communities.

Survivorship Bias

Focusing on successes while ignoring failures that aren't visible. Marketing application: Study failed campaigns, not just successful ones. The viral hit you're copying had 99 failures you didn't see.

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Quick Reference

When facing a marketing challenge, consider:

Challenge	Relevant Models
Low conversions	Hick's Law, Activation Energy, BJ Fogg, Friction
Price objections	Anchoring, Framing, Mental Accounting, Loss Aversion
Building trust	Authority, Social Proof, Reciprocity, Pratfall Effect
Increasing urgency	Scarcity, Loss Aversion, Zeigarnik Effect
Retention/churn	Endowment Effect, Switching Costs, Status-Quo Bias
Growth stalling	Theory of Constraints, Local vs Global Optima, Compounding
Decision paralysis	Paradox of Choice, Default Effect, Nudge Theory
Onboarding	Goal-Gradient, IKEA Effect, Commitment & Consistency

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Task-Specific Questions

1. What specific behavior are you trying to influence?
2. What does your customer believe before encountering your marketing?
3. Where in the journey (awareness → consideration → decision) is this?
4. What's currently preventing the desired action?
5. Have you tested this with real customers?

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Related Skills

• page-cro: Apply psychology to page optimization
• copywriting: Write copy using psychological principles
• popup-cro: Use triggers and psychology in popups
• ab-test-setup: Test psychological hypotheses