CFaiRLLM: Consumer Fairness Evaluation in Large-Language Model Recommender System

CFaiRLLM: Consumer Fairness Evaluation in Large-Language Model Recommender System

Feb 2024 | YASHAR DELDJOO, Politecnico di Bari, Italy TOMMASO DI NOIA, Politecnico di Bari, Italy
The paper "CFaiRLLM: Consumer Fairness Evaluation in Large-Language Model Recommender System" by Yashar Deldjoo and Tommaso di Noia from Politecnico di Bari, Italy, addresses the critical issue of fairness in recommender systems (RS) that integrate Large Language Models (LLMs) such as ChatGPT. The authors introduce a comprehensive evaluation framework, CFaiRLLM, to assess and mitigate biases in consumer-side recommendations within RecLLMs. The study systematically evaluates the fairness of RecLLMs by examining how recommendations vary with the inclusion of sensitive attributes like gender and age, through both similarity alignment and true preference alignment. The framework identifies potential biases by analyzing recommendations under different conditions, including the use of sensitive attributes in user prompts. Key aspects of the study include exploring how different user profile construction strategies (random, top-rated, recent) impact the alignment between recommendations made without and with consideration of sensitive attributes. The findings highlight significant disparities in the fairness of recommendations, particularly when sensitive attributes are integrated into the recommendation process. The choice of user profile sampling strategy plays a crucial role in affecting fairness outcomes, underscoring the complexity of achieving fair recommendations in the era of LLMs. The paper contributes to the field by offering a new framework and metrics for evaluating consumer fairness in RecLLMs, advancing the understanding of fairness and proposing avenues for developing more equitable recommender systems. The research serves as a foundation for further exploration of the ethical dimensions of RecLLMs, ensuring that these powerful tools provide equitable service to all users. The contributions of the work include: 1. Introducing an enhanced evaluation framework for consumer fairness in RecLLMs. 2. Investigating intersectional prompts in RecLLMs. 3. Enhancing the understanding of unfairness through user profile sampling strategies. 4. Comparing with existing work to refine the foundational framework. The paper also reviews related work on fairness in RS and the integration of LLMs into RS, highlighting the importance of considering biases and fairness in the development of RecLLM systems. The proposed CFairLLM framework is designed to assess fairness from a consumer perspective, refining the conceptualization of fairness and addressing limitations in existing frameworks. The framework evaluates fairness based on the alignment between recommendations and users' actual preferences, moving beyond mere list comparison to consider the actual benefits to users.The paper "CFaiRLLM: Consumer Fairness Evaluation in Large-Language Model Recommender System" by Yashar Deldjoo and Tommaso di Noia from Politecnico di Bari, Italy, addresses the critical issue of fairness in recommender systems (RS) that integrate Large Language Models (LLMs) such as ChatGPT. The authors introduce a comprehensive evaluation framework, CFaiRLLM, to assess and mitigate biases in consumer-side recommendations within RecLLMs. The study systematically evaluates the fairness of RecLLMs by examining how recommendations vary with the inclusion of sensitive attributes like gender and age, through both similarity alignment and true preference alignment. The framework identifies potential biases by analyzing recommendations under different conditions, including the use of sensitive attributes in user prompts. Key aspects of the study include exploring how different user profile construction strategies (random, top-rated, recent) impact the alignment between recommendations made without and with consideration of sensitive attributes. The findings highlight significant disparities in the fairness of recommendations, particularly when sensitive attributes are integrated into the recommendation process. The choice of user profile sampling strategy plays a crucial role in affecting fairness outcomes, underscoring the complexity of achieving fair recommendations in the era of LLMs. The paper contributes to the field by offering a new framework and metrics for evaluating consumer fairness in RecLLMs, advancing the understanding of fairness and proposing avenues for developing more equitable recommender systems. The research serves as a foundation for further exploration of the ethical dimensions of RecLLMs, ensuring that these powerful tools provide equitable service to all users. The contributions of the work include: 1. Introducing an enhanced evaluation framework for consumer fairness in RecLLMs. 2. Investigating intersectional prompts in RecLLMs. 3. Enhancing the understanding of unfairness through user profile sampling strategies. 4. Comparing with existing work to refine the foundational framework. The paper also reviews related work on fairness in RS and the integration of LLMs into RS, highlighting the importance of considering biases and fairness in the development of RecLLM systems. The proposed CFairLLM framework is designed to assess fairness from a consumer perspective, refining the conceptualization of fairness and addressing limitations in existing frameworks. The framework evaluates fairness based on the alignment between recommendations and users' actual preferences, moving beyond mere list comparison to consider the actual benefits to users.
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[slides and audio] CFaiRLLM%3A Consumer Fairness Evaluation in Large-Language Model Recommender System