Search Results for author: Sami Khenissi

Found 4 papers, 3 papers with code

Debiasing the Cloze Task in Sequential Recommendation with Bidirectional Transformers

1 code implementation22 Jan 2023 Khalil Damak, Sami Khenissi, Olfa Nasraoui

The most common approach to mitigating exposure bias in recommendation has been Inverse Propensity Scoring (IPS), which consists of down-weighting the interacted predictions in the loss function in proportion to their propensities of exposure, yielding a theoretically unbiased learning.

Language Modelling Masked Language Modeling +1

Debiased Explainable Pairwise Ranking from Implicit Feedback

1 code implementation30 Jul 2021 Khalil Damak, Sami Khenissi, Olfa Nasraoui

In this work, we first propose a novel explainable loss function and a corresponding Matrix Factorization-based model called Explainable Bayesian Personalized Ranking (EBPR) that generates recommendations along with item-based explanations.

Fairness Recommendation Systems

Theoretical Modeling of the Iterative Properties of User Discovery in a Collaborative Filtering Recommender System

1 code implementation21 Aug 2020 Sami Khenissi, Mariem Boujelbene, Olfa Nasraoui

We present a theoretical framework to model the asymptotic evolution of the different components of a recommender system operating within a feedback loop setting, and derive theoretical bounds and convergence properties on quantifiable measures of the user discovery and blind spots.

BIG-bench Machine Learning Collaborative Filtering +1

Modeling and Counteracting Exposure Bias in Recommender Systems

no code implementations1 Jan 2020 Sami Khenissi, Olfa Nasraoui

Then we model the exposure that is borne from the interaction between the user and the recommender system and propose new debiasing strategies for these systems.

BIG-bench Machine Learning Decision Making +1

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