MAPPINGS AND AFFORDANCES 12/1/2018 SD142-Catherine M. Burns

Chording KeyBoard Exercise 12/1/2018 SD142-Catherine M. Burns

Uses combinations of keys to generate the alphabet 12/1/2018 SD142-Catherine M. Burns

With a partner Develop a mapping between the alphabet and the keyboard Make a paper prototype of the keyboard Test your keyboard with the following statement The quick brown fox jumped over the lazy dog. Make sure you both try it and time each other. 12/1/2018 SD142-Catherine M. Burns

Discussion Items Can you label the keys? How many things does each button do? Examples of mappings Examples of usability times If you were selling this, would you need a manual? What would be in it? 12/1/2018 SD142-Catherine M. Burns

Keyboard Video Requires live connection, available on the website. 12/1/2018 SD142-Catherine M. Burns

Which is more common today, the chording keyboard or the QWERTY keyboard? WHY? 12/1/2018 SD142-Catherine M. Burns

Designs that don't work for people don't work at all! 12/1/2018 SD142-Catherine M. Burns

Examples of Bad Designs Digital Watches buttons that do different things but look the same buttons that do multiple things on the same button Doors that don’t indicate push/pull or that they are even doors. 12/1/2018 SD142-Catherine M. Burns

What’s the problem? What the object does, (its opportunities for ACTION) are not visible Your user needs to know two things HOW IT WORKS WHAT IT DOES These are the object’s AFFORDANCES 12/1/2018 SD142-Catherine M. Burns

Sounds easy right? Doors at UW Exit of the Davis Centre by the library. Internal set has same handle for push and pull. Engineering Lecture Hall doors. If you have to write “PUSH” or “PULL” on it, you’ve already got a bad design. 12/1/2018 SD142-Catherine M. Burns

Making Affordances Visible Affordances become visible by establishing mappings. Mapping: a connection between what you want to do and what is possible 12/1/2018 SD142-Catherine M. Burns

Affordances Affordance: the properties of a thing e.g. chairs afford "sitting on" what about tables? Affordances are "designed in" but sometimes things afford more possibilities than intended. 12/1/2018 SD142-Catherine M. Burns

Goal in design: direct processing, immediate use People process affordances directly and naturally without thinking about them. Goal in design: direct processing, immediate use Corollary: If you need a manual for it, its probably poorly designed! 12/1/2018 SD142-Catherine M. Burns

Kinds of Mappings 1. Natural Mappings: goal of user maps directly to style of use. e.g. steering wheel on car, turn right, top moves to right. 2. Social/Cultural Mappings: movement or mapping follows a social convention e.g. light switches 12/1/2018 SD142-Catherine M. Burns

Feedback What is feedback? Letting the user know that their action has been done. e.g. push of buttons, tones, messages, visual indications. response USER SYSTEM signal feedback 12/1/2018 SD142-Catherine M. Burns

Constraining User Actions using smart design to prevent mistakes, errors, and injuries Floppy diskette example. It only goes in one way. Try it! Most human errors indicate a design problem. Design to: 1. reduce human error 2. minimise the effect of it. 12/1/2018 SD142-Catherine M. Burns