One of Don Norman's most popular talks. This is an updated condensation of Norman's best-selling book, "The Psychology of Everyday Things" (the paperback title is "The Design of Everyday Things"). Designed for the non-technical audience, this lecture provides powerful motivation for the role of usability in design. Never again will you open a door, use your stove, or even turn on a light switch or water faucet without thinking about design.
But the talk is more than fun, more than motivation: it also provides some solid, scientific principles for design, especially the role of conceptual models, the role of perceived affordances, and the power of constraints. The talk is currently being updated with new examples from today's modern world of ever-frustrating technology, whether it be doors, refrigerators, microwave ovens, or computers.
"You haven't seen anything yet," says Norman, "wait until digital and high-definition TV hits homes, coupled with DVD, new set-top boxes, and built-in web browsing. Some companies will get it right: most will get it wrong." The ones that get it wrong clearly didn't read the book or go to the talk.
"The use of the Phonograph must be learned, the same as anything else. ... (One needs) a few days to learn everything about it and only a few weeks practice to acquire all the dexterity in its use."
Why does everything have to be so difficult? We spend far too many hours coaxing our technology into submission, however briefly. We spend time installing it, learning it, restarting it, and then updating it. We are constantly setting the time, changing batteries, re-entering information. We live in the age of digital information, a world that promises multiple blessings. That doesn't mean we are going to like it.
In this talk I take aim at the causes of our frustrations: poor design. It doesn't have to be this way. It is possible to make technology that fits people, but so far, few companies have paid much attention to this problem. I cover the deadly design sins that lead to difficulty: featuritis, over-cleverness, inconsistency, cuteness, being different just to be different, arrogance, technical superiority, and failure to understand human needs, psychology and behavior. I argue for simplicity and elegance, for the adroit use of a cohesive, coherent conceptual model, perceived affordances, constraints, and conventions.
We already know the solution: human-centered design. But human-centered design requires a very different approach to design than is commonly done. It requires paying attention to the needs of customers and everyday people. It requires a multidisciplinary approach, where social scientists work together with engineers and computer scientists to create the products of tomorrow.
What we need is a new design profession. And some good old-fashioned advocacy, advocacy for the right and needs of people.
Technologies always get more complex over time, but complexity can be hidden. Indeed, if we want our technologies to be simpler to use, they might very well have to be more complex inside. Witness the modern automobile, ever more simple to use, ever more complex inside. Contrast this with the modern computer: every more complex inside, ever more difficult to use. The computer companies don't seem to understand.
The double-edged sword is a technology, and technology is like a double-edged sword. It can enhance and diminish our lives. And a good part of the diminishment simply comes from the complexity, a complexity that is unnecessary.
- The time course of a technology.
- The distinction between internal complexity, which is OK, and difficulty for the user, which is not.
- What makes things hard to use? What makes them easy?
- The role of the designer
- The solution: human-centered design
- User advocacy: a new profession.
- There are many problems