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25 Cards in this Set

  • Front
  • Back
What is HCI?
Human COmputer Interaction, using design, evaluation and implementation of interacting systems and examining human interaction with these systems.
HCI includes what fields?
Psychology, COmputer Science, Instructional and Graphic Designers, Technical Writers, HUman factors and Ergonomic experts, anthropologists and sociologists
Usability Vs. "User Friendly"
"user Friendly" is vague and subjective and therefore difficult to measure
Usability is how well a user can use the systems functionality, a well-designed interface system is one where the user can do any task with little or no hassle
Usability Engineering Systems
1) Requirement Analysis
2) Design(Task Analysis, Design guideline and principles)
3) Implementation (prototyping, GUI Implementation)
4)Evaluation (Prototype, Expert, Predictive, Empiri
Goals of Requirement Analysis
-To determine the User Needs
-The tasks and subtasks
-Even the occasional and exceptional tasks
-Functionality must match need, can't be inadequate or excessive
-To ensure reliability
-transparent actions, user's faith, privacy, security and integrity--To Promote
-Standardization, Integration, Consistency, and Portability
-Complete project on time and within budget
Usability Measures:
-is what you need to do to evaluate the user population
-define the target user community
-evaluate multiple design alternatives
--keep in mind that user communities evolve and changes
-5 human factors for evalution
1) TIme to learn
2) Speed of performance
3) Rate of errors by users
4) Retention overtime
5) subjective satisfaction
-Trade-offs in design options
-Test interfaces with users via mockup or prototypes
Usability Motivations:
Industrial and Commerical
-So more industries will be interested in you system
-Reduce cost, such as training and errors
-Speed of performance(High Volume Transactions)
-Subjective Satisfaction
Usability Motivations:
Office, Home, Entertainment
Ease of learning and low error rates are essential for success
-Low Cost is necessary because of fierce competition
Usability Motivations:
Exploratory, Creative and Cooperative systems
Collaborative work
-benchmarks are hard to describe
-Interface should absorb user into their task domain
Usability Motivations:
Social-Technical Systems
Privacy Security
Ease of learning for trust
Universal Usability
-Physical abilities and physical workplaces
-Vision, Touch, Hearing, Ergonomics
-Cognitive and Perceptual Abilities
-Know the human cognitive process, to interpret sensory input rapidly and to initiate complex actions makes modern computer systems possible
Context
-The factors that we know and bring to a situation(mindset)
-These can have a profound effect on the usability of user interfaces
Recognition Vs. Recall
It is easier to recognize things than to recall tem
Memory Aids
Slogans/catch phrases
Familar pictures for tasks
Goals of Requirement Analysis
-To determine the User Needs
-The tasks and subtasks
-Even the occasional and exceptional tasks
-Functionality must match need, can't be inadequate or excessive
-To ensure reliability
-transparent actions, user's faith, privacy, security and integrity--To Promote
-Standardization, Integration, Consistency, and Portability
-Complete project on time and within budget
Usability Measures:
-is what you need to do to evaluate the user population
-define the target user community
-evaluate multiple design alternatives
--keep in mind that user communities evolve and changes
-5 human factors for evalution
1) TIme to learn
2) Speed of performance
3) Rate of errors by users
4) Retention overtime
5) subjective satisfaction
-Trade-offs in design options
-Test interfaces with users via mockup or prototypes
Usability Motivations:
Industrial and Commerical
-So more industries will be interested in you system
-Reduce cost, such as training and errors
-Speed of performance(High Volume Transactions)
-Subjective Satisfaction
Usability Motivations:
Office, Home, Entertainment
Ease of learning and low error rates are essential for success
-Low Cost is necessary because of fierce competition
Usability Motivations:
Exploratory, Creative and Cooperative systems
Collaborative work
-benchmarks are hard to describe
-Interface should absorb user into their task domain
Usability Motivations:
Social-Technical Systems
Privacy Security
Ease of learning for trust
Universal Usability
-Physical abilities and physical workplaces
-Vision, Touch, Hearing, Ergonomics
-Cognitive and Perceptual Abilities
-Know the human cognitive process, to interpret sensory input rapidly and to initiate complex actions makes modern computer systems possible
Context
-The factors that we know and bring to a situation(mindset)
-These can have a profound effect on the usability of user interfaces
Recognition Vs. Recall
It is easier to recognize things than to recall tem
Memory Aids
Slogans/catch phrases
Familar pictures for tasks
Waterfall Model
Documentation driven, creating and going back in feed back loops
-not a good approach for user interface design
-User interface is risky, users are not involved in validation until acceptance testing
Can lead to throwing a lot of carefully tested code