Human Computer Interaction (HCI)

1. Human
Computer
Interaction
(HCI)
Group Members:
Buwenaka, Piyumika, Thilan,
Sachith, Nuwan
Group 4

3. Humans and Computers
 Humans – Complex organisms capable of
achieving things and the most intelligent
animal species.
 Computers – Designed by humans to
make their lives easy by giving them tasks
to complete.
 HCI connects these two parties in a
manner they both understand each other
with the help of an interface.

4. Understanding User Interface

5. Definition of HCI
 Human-computer interaction is a
discipline concerned with the design,
evaluation, and implementation of
interactive computing systems for human
use and with the study of major
phenomena surrounding them.
-Thomas T. Hewett, 1992

6. What is HCI?
 HCI is the design, study and plan of the
interaction between humans and
computers.

7. A HCI should be
 Simple
 Useful
 Accessible
 Time Saving
 Attractive

8. History
 Human-computer interaction arose as a
field from fields such as computer
graphics, operating systems, human
factors, industrial engineering,
psychology, and the systems part of
computer science.

9. Importance of HCI for Computer
Science undergraduates
 Study of interface with information.
 To have a competitive advantage once
in the field with rivals.
 Interface layout understanding – How big
the buttons, text and menus should be.
 Effects an individual’s;
 Effectiveness
 Productivity

10. Human Computer Interaction
(HCI)
 HCI mainly involves the communication
between humans and computer through
an interface. This is called as a Human-
Computer Interface

12. Principles of HCI design
 Perceptual principles
 The interface display should be
understandable and clear.
 Usage of human sensory variables such as
color and size.
 Use of redundancy – If a signal is presented
more than once it is likely that the user
remembers it.

13. Principles of HCI design
 Mental principles
 Picture realism – configuring the interface in
a manner which looks like it would in the
represented environment.
 Use of moving elements in the interface
such as temperature displaying systems.

14. Principles of HCI design
 Memory principles
 Replacing textual information with visual
information.
 Simpler tasks to reduce the use of the user’s
mental resources.

15. Types of User Interface
 Graphical User Interface (GUI).
 Web-based User Interface.
 Command Line Interface (CLI).
 Touch User Interface – Touchscreens

16. Command Line Interface (CLI) – Screenshot Command Prompt

17. Graphical User Interface (screenshot © Apple)

18. Thank You!