1. Human Computer Interaction
By:
Mumtaz Ali

2. Warning! Lecture slides are high-level description of lectures
Relying upon only the slides do not guarantee good grades in exams
For achieving good grades in exams always attend lectures, Study books, and explore web resources.

3. Agenda Goals of HCI Usability goals User experience goals
Usability and Quality
Evolution of HCI

4. Fundamental difference between HCI and Software Engineering
Software engineering is primarily concerned with internal working of computers or with software. It is not primarily concerned with the external working of software. It is the Human Computer Interaction that has the primary concern with external working or behavior of the computer system or the software. (A common user is unconcerned about the software used in a computerized equipment but it is concerned with its working/ behavior only. This aspect is taken over by HCI)

5. Human Computer Interaction
Definition: : “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.” ACM/IEEE

6. Engineer’s goal
An engineer’s goal is to make a system, a device that have features to work reliably without any flaws and that can be maintained easily.
Software engineers are mainly concerned with the software system and the internal working of the computer system.

7. Human Computer Interaction (HCI)
Human side:
Human (users) interact with computers through experience/ feeling (called User Experience). This experience is gained through an interface that the computer system provides.
Computer side:
There could be two main types of interfaces:
Hardware interface
Software interface

8. User Experience Experience: Some examples of:
Good Experience: Satisfaction, Happiness, Elation
Bad Experience: Frustration, Resentment, Anger
User Experience:
The user experience is the holistic combination of everything that the user
- Sees
- Touches
- Feels
- Interacts with

9. Usability
Usability is one of the attributes of Interface
It is the ease of use: Could I use it?
Usefulness: Would I use it?
Ensuring that interactive products are easy to learn, effective to user and enjoyable from the User’s perspective

10. Perspective
Perspective is “How do you see or conceive a message conveyed by something”
Different people might have different perception about a message.
Likewise engineers might have a different perspective about computer devices as compare to other users.
HCI keeps the perspective of the user at forefront.

11. Usability Goals Effectiveness Efficiency Safety Utility Learnability
Memorability
Usability works for better User Experience

12. Usability Goals
Effectiveness: How good the system is at doing what it is supposed to do e.g., I-drive implementation in cars
Efficiency: It is the way system supports its users in carrying out their tasks e.g., Websites 10 vs. 5 clicks

13. Usability Goals
Safety: It is protecting the user from dangerous conditions and undesirable situation e.g., adjacent save and close.
Utility: System providing the right kind of functionality so that the user can do what they want e.g., Find the information from web that is of no or a little use to you.

14. Usability Goals
Learnability: It is provision of easiness in learning e.g., Airplane’s customer entertainment system
Memorability: It is how is it easy to re-call the thing that you have learnt e.g., short keys

15. User Experience Goals Satisfying Enjoyable Fun Entertaining Helpful
Motivating
Esthetically Pleasing
Supportive of Creativity

16. User Experience Goals
Rewarding
Emotionally Fulfilling

17. Usability vs. Quality
Usability is “Ensuring that interactive products are easy to learn, effective to user and enjoyable from the User’s perspective”
Quality is the extent to which a software product exhibits the characteristics like:
- Functionality
- Reliability
- Usability
- Efficiency
- Maintainability
- Portability

18. (See the description of assignment page)
Evolution of HCI
Home Assignment
(See the description of assignment page)

19. Questions?