Growing Collection: The Science Behind High-Performing Websites

Websites are often discussed in terms of aesthetics, trends, frameworks, and tools. But underneath every layout, navigation, and call to action lies something more fundamental: how people think, process information, and make decisions. At PSWD, we’ve started building a public, continuously expanding collection of behavioral science principles that inform how we design and structure high-performing websites. This is not an attempt to summarize every study ever published. And it is not about attaching scientific language to marketing advice. It is a curated set of principles that have practical relevance for web design, branding, and UI/UX – concepts that explain why clarity builds trust, why structure reduces friction, and why some websites create momentum while others create hesitation. We call this foundation: Web Momentum. Why Behavioral Science Matters in Web Design Every website is a decision environment. Visitors constantly (often subconsciously) evaluate: What is this? Is this re