User interface for recommender systems

Several of the projects have evaluated the usability of recommendation presentation. While sometimes usability evaluations do not reveal one correct answer, there are issues to consider in displaying recommendations:
  • The number of recommendations to display (AEIOU found that five or six seems right)
  • The most appropriate location on the search result(s) page for the recommendations?
  • If there should be links to recommendations from the top of the page, if the recommendations appear below the fold (i.e. below the initially displayed area, for a particular sized screen)