HCI Lecture Notes: Introduction to Usability and UI/UX Design, Slides of Human-Computer Interaction Design

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lecture 1

Principle of :

Human Computer Interaction

HCI

Dr. Nermeen Kashief

Course’s Martials

Textbooks: Dix, A., Finlay, J., Abowd, G.D., & Beale, R. (2004). Human computer interaction (3rd^ ed.). You can find all of the resources related to this book online from the book’s website at http://www.hcibook.com/e3/plain/about/book/. Marks distribution of HCI Course Report 1 5 Midterm 10 Report 2 5 Practical 20 Semester 60 final total 100

1- Introduction

• Interacting with technology has become an essential part of everyday life for the majority of people.
• People are busy and may spend little or no time actually learning a new system.
• Therefore, computer systems should be easy to use, easy to learn, and with no errors.
• To design and develop of such a system is a major

concern of HCI

2- What is HCI?

• How to enable interaction between human and computer by making computers more usable.

A. Human (users)

• The user who interact with computer
• The golden principle in HCI is that

“people should come first”.

Problem  Users have different abilities?

Users have different abilities:

• Culture environments
• Cognitive abilities
• Experience
• Physically
  • Age,
  • hand size,
  • height,
  • strength,
  • Disabilities

B. C omputer

• Computers are not just computers anymore

(Embedded machines)

• mobile phone
• Camera
• Car
• Washing machine, dish washer
• Alarm clock
• ATM
• Copy machine

B. C omputer

a computer system is made up of various elements each of these elements affects the interaction

• input devices – text entry and pointing
• output devices – screen (small&large), digital paper
• virtual reality – special interaction and display devices
• physical interaction – e.g. sound, haptic, bio-sensing
• paper – as output (print) and input (scan)
• memory – RAM & permanent media, capacity & access
• processing – speed of processing, networks

Example of interaction: Chatbots

• Today chatbots have become one of the most

promising and useful tools a company can use

to communicate with its customers in natural

language.

• Customer services
• Don’t pay
• Google assistance
• Woebot (medical)
• ATM

Why is usability

Important?

A usable system is:

1. easy to use
2. easy to learn
3. easy to remember how to use
4. efficient and effective to use
5. safe to use
6. enjoyable to use

Dimensions of Usability?

A usable system is:

2. Easy to learn Learnability : How easy is it for users to accomplish basic tasks the first time they encounter the design? 3. Easy to remember how to use Memorability : When users return to the design after a period of not using it, how easily can they reestablish proficiency?

Dimensions of Usability?

4- Likeability=Enjoyable to use

People may like a product for any other reason…