Everyday Things Donald Norman You would need and

Everyday Things Donald Norman

You would need and engineering degree to figure this out? • What devices have tried that were not easy to use? – Watches – VCRs – Packages that seem impossible to open – Washing Machines – http: //www. actsofvolition. com/archive/2001/mar ch/coffeepotfor

What is this? • http: //www. actsofvolition. com/archive/2001/ march/coffeepotfor

Devices that are complex to operate • Aircraft

Devices that are complex to operate • 18 wheeler

Devices that shouldn’t be complex, BUT sometimes are • Everyday Things – Doors • Correct parts must be visible • They must convey the right message – Telephone systems

Conceptual Models • Affordances – Scissors – Chairs • Constraints – Scissors Size of Holes • Mappings – Between holes and fingers, the set of possible operations is suggested and constrained by the holes • See Figure 1. 7

What is wrong with my Fridge? • Figures 1. 8, 1. 9

Good & Bad Design

Good Design (our goal!) “Every designer wants to build a high-quality interactive system that is admired by colleagues, celebrated by users, circulated widely, and imitated frequently. ” (Shneiderman, 1992, p. 7) …and anything goes!…

The Good…

The Good…

The Bad…

The Bad…

The Good…

The Bad…

The Ugly…

The Ugly…

The (really) Ugly…

What The…? ? ?

Impossible Objects or unworkable objects

More Impossible Objects http: //www. cienaniosdeperdon. com. ar/IO/index 1. htm