The designer has an obligation to provide an appropriate conceptual model for the way that the device works. It doesn't have to completely accurate but it has to be sufficiently accurate that it will help in both the learning of the operation and also dealing with novel situations.

The designer has an obligation to provide an appropriate conceptual model for the way that the device works. It doesn't have to completely accurate but it has to be sufficiently accurate that it will help in both the learning of the operation and also dealing with novel situations.

Forget the complaints against complexity; instead, complain about confusion.

Technology may change rapidly, but people change slowly. The principals [of design] come from understanding of people. They remain true forever.

Beauty and brains, pleasure and usability - they should go hand in hand.

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

In my opinion, no single design is apt to be optimal for everyone.