In a distracted environment, the best form of smartphone interaction is a high-speed, easy-to-use one. Luke calls the typical mobile usage a "one thumb, one eyeball" experience, since the highly distracted environment causes most mobile users to engage in one-handed use with short spans of partial attention.

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We’re not as rational as we think. The human brain is designed to make quick and effective decisions rather than stick to facts at all times. Instead of acting rationally, we prefer to act fast. This may lead to better outcomes indeed, but it might also lead you astray. Cognitive biases can be both a blessing and a curse.

We can’t “fix” our minds and stop making errors in judgment, but we can become more aware of biases that influence our decision making.

Below is a list of cognitive biases and design principles (with examples and tips) for each category. Let’s dive right in.

Tried and true principles for the past, present, and future of good design

100. When we design products and services, it’s not about what we want them to be — it’s what we want the people using them to be: generous, helpful, thoughtful, useful, beautiful, respectful, kind.

Although successful websites typically have high usability, average sites can hurt their business by copying design elements that don't work well in other contexts.

ood UI design is all about guiding attention to what’s important. When making the right thing for the user the easy and obvious thing, you can’t ignore cognitive biases. After all, these biases are brain shortcuts that let us quickly and effortlessly make decisions and react to our environment.

The Europa Web Guide is the official rulebook for the European Commission's web presence, covering editorial, legal, technical, visual and contractual aspects. All European Commission web sites must observe the rules and guidelines it contains. Web practitioners are invited to observe its contents and keep abreast of updates.

Law 1 / Reduce - The simplest way to achieve simplicity is through thoughtful reduction.Law 2 / Organize - Organization makes a system of many appear fewer.Law 3 / Time - Savings in time feel like simplicity.Law 4 / Learn - Knowledge makes everything simpler.Law 5 / Differences - Simplicity and complexity need each other.Law 6 / Context - What lie…

"Designers love it, website owners want to fill it. Whitespace seems to be one of the most controversial aspects of design. Why then is it so important and how can we ensure it is maintained?"

Summary: Design elements that appear similar in some way — sharing the same color, shape, or size — are perceived as related, while elements that appear dissimilar are perceived as belonging to separate groups.

"While it is important to keep key information easily accessible, the 3-click rule is an arbitrary rule of thumb that is not backed by data."

"In spite of an increase in Internet speed, webpage speeds have not improved over time."