Week 5 Outline

• Discuss differences between learning what tasks people do and how they do it.

  Which methods are best for learning what tasks people do? Which methods are best for learning how people do their tasks? What about learning where people have difficulties performing tasks?

  Results from class discussion

• Clustering and labeling content

• Measures of similarity (revisited)

  • Measures between two items based on co-occurence

  • Measures between two items described by features

    • Manhattan distance
    • Euclidean distance
    • Cosine distance
    
    

  • Judged measures of similarity

  • Other measures of similarity

• Review for quiz next week

• Introduction to scanning strategies

  See the Hornoff and Halverson for a study on one type of scanning task. How does their task differ from other common tasks? How does their navigation system compare to those presented in chapter 7 of Rosenfeld and Morville?

• Construct structures for testing