Prototyping and User Testing Results:

• User testing was an essential tool for development
  
  
• Two to three rounds of user testing were required per feature
  
  
• Prototype fidelity influenced user's interaction styles

Paper

• Paper prototyping found most navigation problems
  
  
• Nomenclature problems discovered: industry terms were not understood. One user remarked, "I don't even know what that word [genre] is";
  
  
• Initial button labels and titles were often misunderstood

Director:

• Most refinement of features was done with Director
  
  
• Determined user's interest in other features with out fully implementing them
  
  
• Fixed problems with button affordance, erroneous entries and layout

Hi Fidelity, Database Driven:

• Found specific Hi-Fi usability problems, e.g. similar movie titles or too many matches
  
  
• Discovered the importance of interaction context. Touch screen affordances are markedly different from mouse based ones
  
  
• Added new interaction techniques based on users' interaction attempts

Field Test:

• Final test was in a real video rental store
  
  
• Observed five people using the prototype
  
  
• Two users rented information based on the prototype information and suggestions. The other three users had already selected videos before trying the system

Paper Prototype:

Director Prototype:

Hi Fidelity Database Driven Prototype: