There is a difference between classic active learning and active
learning for recommender system. In the recommender system
context, each item has already been rated by training users while
in classic active learning there is not training user. We take
into account this difference and develop a new method which
competes with a complicated bayesian approach in accuracy
while results in drastically reduced (one order of magnitude)
user waiting times, i.e., the time that the users wait before being
asked a new query