Human Computer Interaction

Chapter-1The Psychopathology of

Everyday Things

Good Design

“Well designed objects are easy to understand. They contain visible clues to their operation.”

Bad Design

“Poorly designed objects are not that easy to understand. They doesn't contain visible clues to their operation.”

Bad Design(Cont.)

Important Principles of Design

“Visibility”“Mappings”

“Appropriate Clues”“Feedbacks”

Case Study-1

“Slide Projector With Single Button”

Case Study-2

“A telephone that hasn't a hold function visible”

Principles of Design

Why?

Principles of Design(Cont.)

Understandability Use+Ability

Principles of Design(Cont.)

Conceptual Model

Principles of Design(Cont.)Conceptual Model

Principles of Design(Cont.)

Conceptual Model

Principles of Design(Cont.)

Visibility

Principles of Design(Cont.)Visibility

Principles of Design(Cont.)

Mappings

Principles of Design(Cont.)Mappings

Principles of Design(Cont.)Affordance

Principles of Design(Cont.)

Feedback

Chapter-7User Centered Design

User Centered Design(Cont.)

Knowledge in the World Knowledge in Head

User Centered Design(Cont.)

Three Conceptual Design Design Model In Designer's Mind

User Model How User Learn to operate

Systems Image

User Centered Design(Cont.)

Simplify The Task's Structure How?

Provide Mental Aids Visibilities Feedbacks Ability to Keep in Control

User Centered Design(Cont.) Fully automated is good? Yes?

I don't have to do anything? No?

Thing can go “wrong” Out of control

Not Fully Yet? Ability to “Control”

User Centered Design(Cont.) Complex Task? How to learn that easily?

?

User Centered Design(Cont.) Complex Task? How to learn that easily?

Break down the task Change the nature of the partial task to shift to next task easily

User Centered Design(Cont.) Dream for error!!!! Design to solve your Dream Errors

User Centered Design(Cont.) All are in control?

User Centered Design(Cont.) All are fine? Ready to go?

●Standardize!!!!! How Soon? Any constraints?

Possibly Yes Cultural? Mentality?

Thank You