Fairness and Bias in Recommender Systems
Alleviating the unfairness issue with knowledge-aware recommendation models
Y.Z. Popov (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Masoud Mansoury – Mentor (TU Delft - Multimedia Computing)
Masoud Mansoury – Graduation committee member (TU Delft - Multimedia Computing)
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Abstract
This study investigates fairness in knowledge-aware recommender systems by evaluating their performance across both accuracy and fairness metrics. Using the MovieLens 1M dataset, we compare general, knowledge-aware, and fairness-optimized models through a custom RecBole-based pipeline. Results indicate knowledge-aware models offer some fairness benefits without major accuracy loss, though no model excels universally. Adjusting loss component weights reveals complex trade-offs and component importance, underscoring the need for nuanced fairness optimization.