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Chapter 14 Designing User Interfaces

Major Topics

• User interfaces • Dialogue guidelines • Feedback • Help • Ecommerce dialogue • Data mining • Ergonomics

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The User Interface

The user interface is the system that helps users communicate with the computer system and/or the application system

User Interface Design Objectives

To design a better user interface, use the following objectives:

• Match the user interface to the task. • Make the user interface efficient. • Provide appropriate feedback to users. • Generate usable queries. • Improve productivity of knowledge

workers.

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Components of the User Interface

The user interface has two main components:

Types of User Interfaces

There are several types of user interfaces:

• Presentation language, which is the

computer-to-human part of the transaction. • Action language that characterizes the human-to-computer portion.

• Natural-language interfaces. • Question-and-answer interfaces. • A menu interface. • Form-fill interfaces. • Command-language interfaces. • Graphical User Interfaces (GUIs).

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Natural-Language Interfaces

Natural-language interfaces permit users to interact with the computer in their everyday or "natural" language. natural

Question-and-Answer Interfaces

• The computer displays a question for the • The user enters an answer via the • The computer acts on that input

keyboard or a mouse click. information in a preprogrammed manner. answer interface most comfortable.

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user on the screen.

• New users may find the question-and-

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