#session-based

Question 1: Single choice

How does session-based recommendation (for example GRU4Rec) differ from sequence-aware recommendation with a model such as Caser?

Sessions are often anonymous and short, so the model must work from the current clicks, with no user profile1
Session-based models ignore the order of the clicks, while sequence-aware models use it2
Session-based recommendation needs explicit ratings, sequence-aware recommendation only clicks3
Sequence-aware models use only the very last item, while session-based models use the user's whole long-term history4