This document provides an introduction to human-computer interaction (HCI). It discusses methodologies for designing interfaces, techniques for implementing and evaluating interfaces, and areas of HCI research like vision-based interaction, ubiquitous computing, and augmented/virtual reality. It emphasizes that even expertly designed systems will not be used if the interface/interaction is terrible. It defines properties like learnability, efficiency, and memorability for evaluating interfaces. It also discusses principles from Don Norman for designing intuitive interfaces, like making the system state and possible actions visible. Finally, it considers interaction as communication between user and technology according to five factors: address, attention, action, alignment, and avoiding accidents.

1. Introduction To

2.  The way humans interact with computers
 Methodologies and processes for designing interfaces
(i.e., given a task and a class of users, design the best
possible interface within given constraints, optimizing
for a desired property such as learnability or efficiency
of use)
 Methods for implementing interfaces (e.g. software
toolkits and libraries; efficient algorithms)
 Techniques for evaluating and comparing interfaces
 Developing new interfaces and interaction techniques
 Developing descriptive and predictive models and
theories of interaction

3.  Human Computer Interaction in following
areas of research:
 Introduction to HCI concepts
 Seminal work
 Vision based interaction
 Multi‐modal interaction
 Ubiquitous computing
 Augmented Reality /Virtual Reality
 Mobile interaction

4.  With a terrible interface / interaction
technique, even the most expertly designed
system will not be used.
 We learn principles of designing user interfaces
 We learn how to test / evaluate interfaces

5.  A multi dimensional property of a product:
 Learnability: how easy s it to accomplish basic
tasks the first time
 Efficiency: how quickly can they perform tasks
once design has been learned
 Memorability: After not using a product for a
time, how easily can re‐establish proficiency
 Errors: how many, how severe, how easy to
recover
 Satisfaction: how pleasant is it to use the product

6.  the perceived and actual properties of the
object
 strong clues to the operation of objects
 when simple things need pictures, labels, or
instructions, the design has failed.

7.  The information sent to the user confirming
that the action has been done or describing
the result of an action

8.  Don Norman defines four fundamental design
principals:
 make it easy to determine what actions can be done
and when.
 make things visible: conceptual model of the system,
alternative actions, results of actions
 make it easy to evaluate the current state of the
system
 follow natural mappings between:
▪ intentions and required actions
▪ actions and effect
▪ information that is visible and interpretation of system state
D.Norman (2002) “The Design of EverydayThings”. NewYork: Basic Books (Perseus)

9. Considers interaction as communication between
user and technology:
1. Address: how do I address one (or more) of
many possible devices?
2. Attention: how do I know the system is ready
and attending to my actions?
3. Action: how do I effect a meaningful action,
control its extent and possibly specify a target
or targets for my action
4. Alignment: how do I know the system is doing
the right thing?
5. Accident: how do I avoid mistakes?

10. Thank you, I am invite questions now
The end…