... terms: Collective, Intelligence, in, and Action. When terms are joined together, they form phrases. Collective Intelligence and Collective Intelli-gence in Action are two useful phrases in our ... CHAPTER 2 Learning from user interactionsAgain, normalizing each of the vectors to unit length leads to table 2. 20.Finally, table 2. 21 contains the similarity matrix between the users by taking ... analyzing the interactions of users with items. User interactions provide valuable insight into preferences and interests. Some of the inter-actions are fairly explicit in terms of their intentions,...