4. Principles Flashcards
What are the principles form Dix and Sheiderman for and name them
Principle to support usability by Dix 1. Learnability 2. Flexibility 3. Robustness Principle for UI-Design from Shneiderman 1. Recognize User diversity 2. Follow the eight golden rules 3. Prevent Errors
What are the quality components of Usability and from whom are they?
from Nielsen Learnability Memorability Satisfaction Efficiency Errors
What types of design rules are there and what two measurements do they have
Principles golden rules and heuristics standards design patterns style guides increasing generality increasing autority
What is the main aspect of the principle learnability and what are its aspects?
the ease with which new user can beginn effective interaction and achieve maximal performance Predictability Sythesizability Familiarity Generalizability Consistancy
What is the main point of the principle flexibility and what are its aspects?
the multiplicity of ways the user and the system exchange information Dialogue initiation Multithreading Task migratability Substitutivity Customizability
What is the main point of the principle robustness and what are its aspects?
the level of support provided to the user in determining successful achievement and assessment of goal-direct behavior Observability Recoverability Task conformance Responsiveness
What is the main point of the principle recognize user diversity and name and explain one approach and one analysis method?
Different users (goals, experience, background, age, …) have different needs and requirements
Persona - not the average but a typical fictional user profile
Stakeholder Analysis
Power/Interest - Keep satisfied, engage closely, monitor, keep informed
Name the eight golden rules?
Strive for consistency Enable frequent users to use shortcuts Offer informative feedback Design dialogues to yield closure Error prevention/handling Permit easy reversal of actions Support internal locus of control Reduce short-term memory load
In the principle of error prevention, name the different categories and types.
Categories: Mistakes, Slipes Capture Error Descriptive Error Data driven Error Associate action error Loss-of-Activation error Mode error
