Is More Always Better? The Effects of Personal Characteristics and Level of Detail on the Perception of Explanations in a Recommender System

• URL: http://arxiv.org/abs/2304.00969v1
• Date: Mon, 3 Apr 2023 13:40:08 GMT
• Title: Is More Always Better? The Effects of Personal Characteristics and Level of Detail on the Perception of Explanations in a Recommender System
• Authors: Mohamed Amine Chatti and Mouadh Guesmi and Laura Vorgerd and Thao Ngo and Shoeb Joarder and Qurat Ul Ain and Arham Muslim
• Abstract summary: We aim in this paper at a shift from a one-size-fits-all to a personalized approach to explainable recommendation. We developed a transparent Recommendation and Interest Modeling Application (RIMA) that provides on-demand personalized explanations. Our results show that the perception of explainable RS with different levels of detail is affected to different degrees by the explanation goal and user type.
• Score: 1.1545092788508224
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Despite the acknowledgment that the perception of explanations may vary considerably between end-users, explainable recommender systems (RS) have traditionally followed a one-size-fits-all model, whereby the same explanation level of detail is provided to each user, without taking into consideration individual user's context, i.e., goals and personal characteristics. To fill this research gap, we aim in this paper at a shift from a one-size-fits-all to a personalized approach to explainable recommendation by giving users agency in deciding which explanation they would like to see. We developed a transparent Recommendation and Interest Modeling Application (RIMA) that provides on-demand personalized explanations of the recommendations, with three levels of detail (basic, intermediate, advanced) to meet the demands of different types of end-users. We conducted a within-subject study (N=31) to investigate the relationship between user's personal characteristics and the explanation level of detail, and the effects of these two variables on the perception of the explainable RS with regard to different explanation goals. Our results show that the perception of explainable RS with different levels of detail is affected to different degrees by the explanation goal and user type. Consequently, we suggested some theoretical and design guidelines to support the systematic design of explanatory interfaces in RS tailored to the user's context.

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