1. Psychological Principles

2. UIDE Chapter 5 Four Psychological Principles Four Psychological Principles –Users See What They Expect to See –Users Have Difficulty Focusing on More Than One Activity at a Time –It Is Easier to Perceive a Structured Layout –It Is Easier to Recognize Something Than to Recall It

3. UIDE Chapter 5 Design Knowledge Design Principles Design Principles –First Principles of Interactive Design First Principles of Interactive DesignFirst Principles of Interactive Design Design Rules Design Rules –8 Golden Rules 8 Golden Rules8 Golden Rules See URL: http://www.usask.ca/education/coursework/skaalid/theory/interface.htm See URL: http://www.usask.ca/education/coursework/skaalid/theory/interface.htm http://www.usask.ca/education/coursework/skaalid/theory/interface.htm

4. UIDE Chapter 5 4 Psychological Principles Users See What They Expect to See Users See What They Expect to See

5. UIDE Chapter 5 4 Psychological Principles Users Have Difficulty Focusing on More Than One Activity at a Time Users Have Difficulty Focusing on More Than One Activity at a Time –The Cocktail Party Effect The Cocktail Party EffectThe Cocktail Party Effect Principle of Perceptual Organization Principle of Perceptual Organization –Group like things together Principle of Importance Principle of Importance –Prominent display for important items

6. UIDE Chapter 5 4 Psychological Principles It Is Easier to Perceive a Structured Layout It Is Easier to Perceive a Structured Layout

7. UIDE Chapter 5 4 Psychological Principles Gestalt principles Gestalt principles a.Proximity Elements close together are seen as groups Elements close together are seen as groups b.Similarity Elements with same shape or color appear to belong togethe r Elements with same shape or color appear to belong togethe r c.Closure When possible, we compllete incomplete objects in our head When possible, we compllete incomplete objects in our head d.Continuity Figure d is two lines of dots, not random ones Figure d is two lines of dots, not random ones e.Symmetry Regions with symmetric borders are sen as shapes Regions with symmetric borders are sen as shapes

8. UIDE Chapter 5 4 Psychological Principles –It Is Easier to Recognize Something Than to Recall It Principle of recognition Principle of recognition Knowledge in the head & Knowledge in the world Knowledge in the head & Knowledge in the world

9. UIDE Chapter 5 Three Principles from Experience: Visibility, Affordance, and Feedback Three Principles from Experience: Visibility, Affordance, and Feedback –The Principle of Visibility: It Should Be Obvious What a Control Is Used For

10. UIDE Chapter 5 Three Principles from Experience: Visibility, Affordance, and Feedback –The Principle of Affordance: It Should Be Obvious How a Control Is Used

11. UIDE Chapter 5 Three Principles from Experience: Visibility, Affordance, and Feedback The Principle of Feedback: It Should Be Obvious When a Control Has Been Used The Principle of Feedback: It Should Be Obvious When a Control Has Been Used