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Kosetsu Tsukuda and Masataka Goto
National Institute of Advanced Industrial Science and Technology (AIST)
Japan
14th ACM Conference on Recommender Systems (RecSys 2020)
Explainable Recommendation
for
Repeat Consumption
Explainable recommendation 2
Existing studies:
generate explanations for
recommending novel items
Our study:
generate explanations for
recommending items that
a user has already consumed
Consumed items Novel items
Explanation
Consumed items Novel items
Explanation
Example explanation 3
We recommend “Shake It Off”
because exactly five years have passed
since you listened to it for the first time.
 The user listens to “Shake It Off” because she can feel nostalgia
by thinking back to those days when she often listened to it
 The service can encourage users to listen to not only novel songs
but also already consumed songs
A user has listened to “Shake It Off” on a music streaming service
Factors for explanations 4
To generate explanations for consumed items, we consider three factors
Personal factor Social factor Item factor
Factors for explanations 5
Exactly three years have passed since you
listened to the recommended song last.
Personal factor considers
the interaction between a target user and a recommended item
To generate explanations for consumed items, we consider three factors
Personal factor Social factor Item factor
Factors for explanations 6
Just now, the number of unique users
listening to the recommended song
reached exactly 100 thousand.
Social factor considers
the interaction between all users on the service and a recommended item
To generate explanations for consumed items, we consider three factors
Personal factor Social factor Item factor
Factors for explanations 7
Item factor is an item-specific factor
that is not related to the users who consumed a recommended item
Today, the artist performed
the recommended song at a live concert.
To generate explanations for consumed items, we consider three factors
Personal factor Social factor Item factor
Evaluations 8
 Propose nine kinds of explanations in music recommendation
 Evaluate the persuasiveness of each explanation by conducting
an online survey involving 622 participants

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Explainable Recommendation for Repeat Consumption (RecSys 2020)

  • 1. Kosetsu Tsukuda and Masataka Goto National Institute of Advanced Industrial Science and Technology (AIST) Japan 14th ACM Conference on Recommender Systems (RecSys 2020) Explainable Recommendation for Repeat Consumption
  • 2. Explainable recommendation 2 Existing studies: generate explanations for recommending novel items Our study: generate explanations for recommending items that a user has already consumed Consumed items Novel items Explanation Consumed items Novel items Explanation
  • 3. Example explanation 3 We recommend “Shake It Off” because exactly five years have passed since you listened to it for the first time.  The user listens to “Shake It Off” because she can feel nostalgia by thinking back to those days when she often listened to it  The service can encourage users to listen to not only novel songs but also already consumed songs A user has listened to “Shake It Off” on a music streaming service
  • 4. Factors for explanations 4 To generate explanations for consumed items, we consider three factors Personal factor Social factor Item factor
  • 5. Factors for explanations 5 Exactly three years have passed since you listened to the recommended song last. Personal factor considers the interaction between a target user and a recommended item To generate explanations for consumed items, we consider three factors Personal factor Social factor Item factor
  • 6. Factors for explanations 6 Just now, the number of unique users listening to the recommended song reached exactly 100 thousand. Social factor considers the interaction between all users on the service and a recommended item To generate explanations for consumed items, we consider three factors Personal factor Social factor Item factor
  • 7. Factors for explanations 7 Item factor is an item-specific factor that is not related to the users who consumed a recommended item Today, the artist performed the recommended song at a live concert. To generate explanations for consumed items, we consider three factors Personal factor Social factor Item factor
  • 8. Evaluations 8  Propose nine kinds of explanations in music recommendation  Evaluate the persuasiveness of each explanation by conducting an online survey involving 622 participants