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A short, friendly guide to web and mobile usability, and to running quick, low-cost usability tests with real people.

Why some objects are easy to use and others frustrate us, and the principles of affordances, signifiers, mapping and feedback behind the difference.

A short, practical guide to planning and running design research on a real team's schedule and budget, and turning what you learn into decisions people act on.

A structured way for product teams to talk to customers every week, map opportunities and test assumptions before they build.