Learning should take place when it is needed, when the learner is interested, not according to some arbitrary, fixed schedule
Donald A. NormanIf people keep buying poorly designed products, manufacturers and designers will think they are doing the right thing and continue as usual.
Donald A. NormanAny time you see signs or labels added to a device, it is an indication of bad design: a simple lock should not require instructions.
Donald A. NormanUser experience is really the whole totality. Opening the package good example. It's the total experience that matters. And that starts from when you first hear about a product experience is more based upon memory than reality. If your memory of the product is wonderful, you will excuse all sorts of incidental things.
Donald A. Norman