This document provides an overview of human-computer interaction (HCI) from the perspective of a student group consisting of Buwenaka, Piyumika, Thilan, Sachith, and Nuwan. It defines HCI as the discipline concerned with designing, evaluating, and implementing interactive computing systems for human use. The document discusses key aspects of HCI like the importance of understanding how humans and computers interact, defining user interfaces, principles of HCI design, the history and importance of HCI, and different types of user interfaces.

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!