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Why does social proof work?

And, what are some practical tips on how to use it to create better designs?

In part one of these Social Proof episodes, we started with the foundations of social psychology. We looked at the history, key studies, and some helpful frameworks.

Now in part two, we’re picking up where we left off—at the five-point framework I mentioned at the end of Part One. This is where things get practical. We’ll connect the social psychology research with actual strategies for implementing social proof.

We’ll explore how social proof methods like testimonials, expert endorsements, and more, have an impact on our psychology, in particular, when we’re making buying decisions.

By the end, you’ll have a framework to decode social proof and a toolkit to apply it thoughtfully.

What You’ll Learn

• Five core psychological drivers— including our need to fit in, our fear of missing out, and so on
• How social proof methods like testimonials, expert endorsements, and more, have an impact on our psychology, in particular, when we’re making buying decisions.
• A framework to decode social proof and a toolkit to apply it thoughtfully.

Key Takeaways

• We relate to other humans, and shared experiences matter.
• We want to fit in—and social proof taps into that drive.
• We trust experts when making decisions under uncertainty.
• We’re motivated by FOMO (fear of missing out).
• Imagination helps us take action when we see others doing the same.

These drivers explain why social proof works. We respond to stories, signals, and shared experiences because they tap into how our minds are wired.

We also explored how to use social proof in design. Whether it’s testimonials, expert endorsements, client logos, or user-generated content, each method works best when it feels real, relevant, and respectful. The goal isn’t to trick users—it’s to guide them with clarity, trust, and connection.

thedesignpsychologist.substack.com is the podcast newsletter. Get episode summaries right in your inbox so you can easily reference, save, and apply what you learn.

Go to thedesignpsychologist.substack.com to get episode summaries right in your inbox so you can easily reference, save, and apply what you learn.

Have you ever been in a crowd where no one clapped until one brave soul started the applause? Or walked past two restaurants—one bustling with a line out the door, the other nearly empty—and felt pulled toward the busy one?

These small, everyday moments reveal something big: we are profoundly influenced by the people around us, often without even realizing it.

This episode kicks off a two-part deep dive into social proof, one of the most powerful concepts in social psychology. Over a century of research shows that humans are wired to pick up on social cues, and these cues quietly shape our behavior, decisions, and preferences.

In Part 1, you’ll learn:

• Why simply being around others can change how we perform.
• How reviews, testimonials, and follower counts tap directly into our social wiring.
• The fascinating story of a 19th-century psychology professor who first noticed how cyclists behaved differently when riding together.
• How social proof research has evolved from early experiments in social psychology to today’s social neuroscience.
• The key psychological principles that explain why social proof works.

This episode is about more than just marketing or design tricks—it’s about understanding the deep human need to notice, follow, and be influenced by others. By grasping the science, you’ll build a foundation for creating products, experiences, and messages that feel natural, trustworthy, and even irresistible.

What’s next:

In Part 2, we’ll move from theory to practice. You’ll get concrete methods and examples to put social proof to work in your own designs and projects.

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Why do so many user personas fail in practice, and what can we do about it?

Have you ever worked on a team where everyone had a different idea of who the user was? Or watched a beautifully crafted persona become ignored or misused? You're not alone. In this episode, we explore why traditional personas often fall short—and how alignment personas can change everything.

You'll learn how to cut through organizational chaos, align stakeholders, and get your team moving in the same direction. You'll also discover a fast, psychology-informed method to surface assumptions, prioritize goals, and build products that stay focused on what really matters.

Meet Our Guest: Tamara Adlin Tamara Adlin is a UX legend. She's the co-author of The Persona Lifecycle and The Essential Persona Lifecycle, played a key role in shaping Amazon's UX strategy, and now leads the charge with her new concept: alignment personas. Her work helps teams avoid derailment, align faster, and make smarter design decisions. She also hosts the podcast Corporate Underpants, tackling the organizational dynamics that show up in bad products.

What We Cover:

• Why personas started off strong—and where they went wrong
• What makes alignment personas radically different and more effective
• How executives act like "tornadoes" and what that means for your designs
• Why assumptions are more powerful than data—and what to do about it
• A five-step alignment process you can run in a single workshop
• Practical tools like the strategy wedge and purpose slide
• How to use design psychology on your own team to influence strategy

Key Takeaways:

• Most personas fail because they gather dust, get misused, or don’t align with actual business priorities.
• Executives often bring strong, unspoken assumptions. Unless you surface them, those assumptions will quietly shape everything your team builds.
• Data alone doesn’t change minds. But alignment personas help teams reveal what they believe—and align around it.
• You don’t need months of research. Just five conversations can expose misalignment, clarify direction, and build shared understanding.
• Design psychology isn’t just for users. It’s a powerful tool for navigating organizations, aligning teams, and protecting your product from chaos.

This episode is packed with real talk, powerful analogies (Greek gods and all), and methods you can use immediately. If you're ready to turn misalignment into momentum, this conversation with Tamara Adlin is your guide.

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