Chapter 5 Requirements gathering: knowledge of user interface design

Chapter 5Chapter 5

Requirements gathering:Requirements gathering:knowledge of userknowledge of userinterface designinterface design

UIDE Chapter 5UIDE Chapter 5

•The Two Types of Knowledge The Two Types of Knowledge Needed for User Interface Needed for User Interface DesignDesign

•Four Psychological PrinciplesFour Psychological Principles– Users See What They Expect to SeeUsers See What They Expect to See

– Users Have Difficulty Focusing on More Users Have Difficulty Focusing on More Than One Activity at a TimeThan One Activity at a Time

– It Is Easier to Perceive a Structured It Is Easier to Perceive a Structured LayoutLayout

– It Is Easier to Recognize Something Than It Is Easier to Recognize Something Than to Recall Itto Recall It


Design KnowledgeDesign Knowledge

• Design PrinciplesDesign Principles– First Principles of Interactive DesignFirst Principles of Interactive Design

• Design RulesDesign Rules– 8 Golden Rules8 Golden Rules

http://www.asktog.com/basics/firstPrinciples.html

http://www.usask.ca/education/coursework/skaalid/theory/interface.htm


4 Psychological Principles4 Psychological Principles

• Users See What They Expect to Users See What They Expect to SeeSee



• Users Have Difficulty Focusing on Users Have Difficulty Focusing on More Than One Activity at a TimeMore Than One Activity at a Time– The Cocktail Party EffectThe Cocktail Party Effect

•Principle of Perceptual OrganizationPrinciple of Perceptual Organization– Group like things togetherGroup like things together

•Principle of ImportancePrinciple of Importance– Prominent display for important itemsProminent display for important items

http://en.wikipedia.org/wiki/Cocktail_party_effect



• It Is Easier to Perceive a It Is Easier to Perceive a Structured LayoutStructured Layout


4 Psychological Principles 4 Psychological Principles

• Gestalt principlesGestalt principlesa.a. ProximityProximity

b.b. SimilaritySimilarity

c.c. ClosureClosure

d.d. ContinuityContinuity

e.e. SymmetrySymmetry



– It Is Easier to Recognize Something It Is Easier to Recognize Something Than to Recall ItThan to Recall It

• Principle of recognitionPrinciple of recognition

• Knowledge in the head & Knowledge Knowledge in the head & Knowledge in the worldin the world


•Three Principles from Three Principles from Experience: Visibility, Experience: Visibility, Affordance, and FeedbackAffordance, and Feedback

– The Principle of The Principle of VisibilityVisibility: It Should : It Should Be Obvious What a Control Is Used Be Obvious What a Control Is Used ForFor


Three Principles from Experience: Three Principles from Experience: Visibility, Affordance, and Visibility, Affordance, and FeedbackFeedback

– The Principle of The Principle of AffordanceAffordance: It : It Should Be Obvious How a Control Is Should Be Obvious How a Control Is UsedUsed


Three Principles from Experience: Three Principles from Experience: Visibility, Affordance, and Visibility, Affordance, and FeedbackFeedback

• The Principle of The Principle of FeedbackFeedback: It Should : It Should Be Obvious When a Control Has Been Be Obvious When a Control Has Been UsedUsed

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Chapter 5 Requirements gathering: knowledge of user interface design