no code implementations • 5 Aug 2023 • Ali Vardasbi, Maarten de Rijke, Fernando Diaz, Mostafa Dehghani
With group bias, the utility of the sensitive groups is under-estimated, hence, without correcting for this bias, a supposedly fair ranking is not truly fair.
no code implementations • 4 May 2023 • Shashank Gupta, Philipp Hager, Jin Huang, Ali Vardasbi, Harrie Oosterhuis
This tutorial provides both an introduction to the core concepts of the field and an overview of recent advancements in its foundations along with several applications of its methods.
1 code implementation • 1 May 2023 • Fatemeh Sarvi, Ali Vardasbi, Mohammad Aliannejadi, Sebastian Schelter, Maarten de Rijke
We therefore propose an outlier-aware click model that accounts for both outlier and position bias, called outlier-aware position-based model ( OPBM).
no code implementations • 25 Apr 2023 • Ali Vardasbi, Telmo Pessoa Pires, Robin M. Schmidt, Stephan Peitz
Structured State Spaces for Sequences (S4) is a recently proposed sequence model with successful applications in various tasks, e. g. vision, language modeling, and audio.
1 code implementation • 19 Aug 2022 • Ali Vardasbi, Maarten de Rijke, Mostafa Dehghani
Using this result, we propose to train two parallel instances of a linear model, initialized with different random seeds, and use their intersection as a signal to detect overfitting.
1 code implementation • 28 Apr 2022 • Ali Vardasbi, Fatemeh Sarvi, Maarten de Rijke
Different from PL, where pointwise logits are used as the distribution parameters, in PPG pairwise inversion probabilities together with a reference permutation construct the distribution.
1 code implementation • 13 Sep 2021 • Hamed Bonab, Mohammad Aliannejadi, Ali Vardasbi, Evangelos Kanoulas, James Allan
We introduce and formalize the problem of cross-market product recommendation, i. e., market adaptation.
1 code implementation • 19 Aug 2021 • Ali Vardasbi, Maarten de Rijke, Ilya Markov
Affine correction (AC) is a generalization of IPS that corrects for position bias and trust bias.
1 code implementation • 24 Aug 2020 • Ali Vardasbi, Harrie Oosterhuis, Maarten de Rijke
Our main contribution is a new estimator based on affine corrections: it both reweights clicks and penalizes items displayed on ranks with high trust bias.
no code implementations • 25 May 2020 • Ali Vardasbi, Maarten de Rijke, Ilya Markov
Unbiased CLTR requires click propensities to compensate for the difference between user clicks and true relevance of search results via IPS.