Social networks data analytical approaches for trust-based recommender systems: A systematic literature review

With the explosive growth of information on the web and the quick provision of novel web services, recommendation systems have emerged as efficient mechanism for providing advice regarding items in which users might be potentially interested. However, a traditional recommender system, which solely mines the user's previous behavior and item descriptions for recommendations, has some drawbacks. To overcome these limitations, a new solution that has recently garnered significant attention is using trust data. This approach, however, presents challenges in utilizing suitable trust data according to recommender systems applications, underlying social network structures, and user needs. In addition, in a selective decision-making system, trust, as a kind of social network data, plays a significant role and needs an appropriate approach for making inferences. This article provides a systematic literature review of the current trust-based social recommender systems. It also presents a detailed categorization of the trust type utilized and inferred from the existing trust-related social networks data analytical approaches. Furthermore, it addresses the main properties and challenges of the most popular trust-based social recommendation systems. Finally, it presents our findings and discusses open issues that provide researchers with insight to develop more enhanced recommender systems. We have thoroughly reviewed the social network-based recommender systems from 2012 to 2023 and identified that they can be classified into different categories. Moreover, we further investigated the articles on trust-based social recommender systems and found that these recommendation systems based on the type of focused social trust can be categorized as trust-of-item-based recommender systems and trust-of-relationship-based recommender systems. So, we decided to provide a systematic review of trust-based social recommender systems. For this, we refer to the figure above.image