Attractive things work better When you wash and wax a car, it drives better, doesn’t it? Or at least feels like it does.

Also note that invariably when we design something that can be used by those with disabilities, we often make it better for everyone

A big ethical question is what happens after people stop using the device. Does it degrade the environment? Could it have been designed so it would actually be good for the environment?

To me, error analysis is the sweet spot for improvement.

Isn't one of your first exercises in learning how to communicate to write a description of how to tie your shoelaces? The point being that it's basically impossible to use text to show that

Behavioral design is all about feeling in control. Includes: usability, understanding, but also the feel.

I believe that the Apple Shuffle is an excellent compromise among the conflicting requirements of simplicity, elegance, size, battery life, and function