Guest 3

Lecture 14 - February 7th, 2017

Guest Lecture

By David Johnson

What is HCI

An introduction to human computer interaction (SENG 310) - David Johnson

Vitural Reality - Human interaction

• The study of the interactions between people and computer interfaces
• The process of designing and buildig software that is usable, useful, and enjoyable

Why should we study HCI?

What is an interface?

• A boundary where two systems / subjects / things meet to exchange information

Interface Examples:

• Google Search
• Apple Watch
• Amazon Echo

Bad Interfaces:

• Lock -> (Door Signage)
• Knobs and Burner

Principles of Good Design

• Robin Williams Book

2 Important Aspects of Good Design:

• Discoverability
• Understanding

Norman's Deisgn Principles

• Visibility
• Affordances & Signifiers
  • Ex. Faucets, Doors
• Constraints
  • Reduce Errors
• Mappings
  • Ex. Burner
• Feedback
  • Satisfaction
• Consistency

Norman Doors

Consequences of Bad Design

• Decrease adoption
• Decrease productibity
• Decrease employee morale
• Data loss

Goals of Good Design

• Usability
• User Experience

Usability Goals:

• Effectiveness
• Efficient
• Safety
• Utility
• Learnability
• Memorability
• Note These do not measure how well the user actually enjoys the experience...

User Experience Goals:

• Satisfaction
• Fun
• Helpful
• Motivating
• Rewarding
• A e s t h e t i c s

Interaction Deisgn

• Requirements Gathering
  • Don't listen to users
  • What they do, versus what they said
  • Gain empathy for the user
  • Questions (Users, Goals, ect.)
• Conceptual Design
  • Model
    • Purpose statement, objects, operations, attribute, relationship
  • Personas
    • Example
  • Scenarios & Use Cases
• Concrete Design
  • Prototyping
  • Interactive Deisgn
  • Fidelity of prototypes (Low - Paper, High - Sketch / InVision)
• Evaluation
  • Does it work?
    • Why, Who, When
    • Cognitive Walkthrough
    • 5 Steps of Usibility
    • 5 Users Min / Max - Interating
• Repeat...

The user is drunk

Link to Video