HCC 831 User Interface Design and Evaluation. Good Design (our goal!) “Every designer wants to build a high-quality interactive system that is admired.

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Presentation transcript:

HCC 831 User Interface Design and Evaluation

Good Design (our goal!) “Every designer wants to build a high-quality interactive system that is admired by colleagues, celebrated by users, circulated widely, and imitated frequently.” (Shneiderman, 1992, p.7) …and anything goes!…

The Good…

The Bad…

The Ugly…

The (really) Ugly…

What The…???

But What Makes it Good?! Functionality Functionality Speed & efficiency Speed & efficiency Reliability, security, data integrity Reliability, security, data integrity Standardization, consistency Standardization, consistency USABILITY ! USABILITY !

Closer to Fine: A Philosophy …The human user of any system is the focus of the design process. Planning and implementation is done with the user in mind, and the system is made to fit the user, not the other way around…. Bruce Walker Georgia Institute of Technology

User Interface Design Is … Built for humans; must be designed for the user Built for humans; must be designed for the user Recognize individual differences; appreciate design implications of these factors Recognize individual differences; appreciate design implications of these factors Recognize the design of things, procedures, etc., influences human behavior and well- being Recognize the design of things, procedures, etc., influences human behavior and well- being Emphasize empirical data & evaluation Emphasize empirical data & evaluation Rely on the scientific method Rely on the scientific method Things, procedures, environments, and people do not exist in isolation Things, procedures, environments, and people do not exist in isolation

User Interface Design Is Not…  NOT just applying checklists and guidelines These can help, but UID is a whole philosophy These can help, but UID is a whole philosophy  NOT using oneself as the model user Know your real users; recognize variation in humans Know your real users; recognize variation in humans  NOT just common sense Knowing how to design a fire alarm so it will be heard over background noise is not something we all know. Knowing how to design a fire alarm so it will be heard over background noise is not something we all know. The UI specialist knows where or how to get the information needed to answer design questions The UI specialist knows where or how to get the information needed to answer design questions

What Are the Key “Factors”?! “It Depends…” “It Depends…” Physical factors Physical factors Perceptual factors Perceptual factors Cognitive factors Cognitive factors Social factors Social factors Historical factors Historical factors …they ALL can affect design!

How Do You Know It’s Good?! Usability Test and Evaluation Usability Test and Evaluation We will get to this later. We will get to this later.

User Interface What is the User Interface? What is the User Interface? To Users, the interface is the system. To Users, the interface is the system.

User Interface What is the User Interface? What is the User Interface? If you build a system that is not usable, then who will use it? (Gilbert, 2000) If you build a system that is not usable, then who will use it? (Gilbert, 2000)

User Interface What is the User Interface? What is the User Interface? For today’s users, communication with the system has become at least as important as computation by the system. For today’s users, communication with the system has become at least as important as computation by the system. Computation is always faster than communication. Computation is always faster than communication.

User Interface What is the User Interface? What is the User Interface? 48% to 100% of code supports the user interface. (This is increasing) 48% to 100% of code supports the user interface. (This is increasing) Computer scientists view interface as NOT an integral part of software. Computer scientists view interface as NOT an integral part of software. Software function Rules All. Software function Rules All.

User Interface What is the User Interface? What is the User Interface? The communication medium between the user and the system. The communication medium between the user and the system.

User Interface User?! User?! Attorneys have clients. Attorneys have clients. Doctors have patients. Doctors have patients. Teachers have students. Teachers have students. Managers have customers. Managers have customers. Researchers have subjects. Researchers have subjects. Drug addicts are Users. Drug addicts are Users. Why do we refer to our clients as users? Why do we refer to our clients as users?