Josh Clark is the founder of Big Medium, a design agency specializing in connected devices, mobile experiences, and responsive web design for the world’s most forward-thinking companies. Josh is author of several books, including Designing for Touch and Tapworthy: Designing Great iPhone Apps, and he speaks around the globe on what’s next for digital interfaces. In 1996, Josh created an entirely different kind of user interface: the Couch-to-5K (C25K) running schedule, which has helped millions of skeptical exercisers take up jogging. (His motto is the same for fitness as it is for software user experience: no pain, no pain.) Find out more about Josh at Big Medium or follow him at @bigmediumjosh.
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Touch adds a new dimension to our designs, and asks us to think not only about the canvas of the screen, but also about how users interact physically with the screen itself. We need to consider the ergonomic needs of holding a smartphone, tablet, or hybrid device—switching hands, swapping grips, and pointing, clicking, and typing. In this excerpt from Chapter 1 of Designing for Touch, Josh Clark examines the role of thumbs in driving our device interactions, no matter the size of the screen.