Human Computer Interaction

The joy of good design often becomes invisible

The Power of Prototyping

Focus on goals in evolving your design

The rights of a prototype

• Should not be required to be complete
• should be easy to change
• Gets to retire

Prototypes answer questions, like...

• How might it look like?
• What might the experience be?

The best way to have a good idea is to have lots of ideas.
-Linus Pauling

Evaluating Designs

Usability studies are a common and straightforward way to find and fix interface bugs in existing software.

Controlled experiments can limit the real-world applicability when they are done in a contrived (人为的) setting.

Surveys are a quick way to gather feedback from lots and lots of users.

Feedback from Experts

• peer Critique
• Dogfooding
• Heuristic Evaluation（启发式）

comparative experiments and Participant Observation is a good way of gaining insights by discovering people's actual practices, as opposed to self-report.

Simulation & Formal Models

Issues to Consider

• Reliability/Precision
• Generalizability
• Realism
• Comparison
• Work Involved

The Birth of HCI

• Vannevar Bush In the 1940s, wrote of how future technologies could augment human intellect.
  Key to the memes idea was effective user interfaces for information
  storage and retrieval

• Grace Hopper invented the compiler.
  The Graphical User Interface
  The mouse and Hypertext

• Doug Engelbart invented the mouse.

• Alan Kay at Xerox PARC, prototyped the Dynabook, and created many important ideas in the graphical user interface