Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization最新文献

筛选

英文中文

Power of the Few: Analyzing the Impact of Influential Users in Collaborative Recommender Systems 少数人的力量:分析协作推荐系统中有影响力的用户的影响

Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization Pub Date : 2019-05-14 DOI: 10.1145/3320435.3320464

Farzad Eskandanian, Nasim Sonboli, B. Mobasher

{"title":"Power of the Few: Analyzing the Impact of Influential Users in Collaborative Recommender Systems","authors":"Farzad Eskandanian, Nasim Sonboli, B. Mobasher","doi":"10.1145/3320435.3320464","DOIUrl":"https://doi.org/10.1145/3320435.3320464","url":null,"abstract":"Like other social systems, in collaborative filtering a small number of \"influential\" users may have a large impact on the recommendations of other users, thus affecting the overall behavior of the system. Identifying influential users and studying their impact on other users is an important problem because it provides insight into how small groups can inadvertently or intentionally affect the behavior of the system as a whole. Modeling these influences can also shed light on patterns and relationships that would otherwise be difficult to discern, hopefully leading to more transparency in how the system generates personalized content. In this work we first formalize the notion of \"influence\" in collaborative filtering using an Influence Discrimination Model. We then empirically identify and characterize influential users and analyze their impact on the system under different underlying recommendation algorithms and across three different recommendation domains: job, movie and book recommendations. Insights from these experiments can help in designing systems that are not only optimized for accuracy, but are also tuned to mitigate the impact of influential users when it might lead to potential imbalance or unfairness in the system's outcomes.","PeriodicalId":254537,"journal":{"name":"Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131330770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Effect of Values and Technology Use on Exercise: Implications for Personalized Behavior Change Interventions 价值观和技术使用对运动的影响:对个性化行为改变干预的启示

Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization Pub Date : 2019-03-27 DOI: 10.1145/3320435.3320451

Yelena Mejova, Kyriaki Kalimeri

{"title":"Effect of Values and Technology Use on Exercise: Implications for Personalized Behavior Change Interventions","authors":"Yelena Mejova, Kyriaki Kalimeri","doi":"10.1145/3320435.3320451","DOIUrl":"https://doi.org/10.1145/3320435.3320451","url":null,"abstract":"Technology has recently been recruited in the war against the ongoing obesity crisis; however, the adoption of Health & Fitness applications for regular exercise is a struggle. In this study, we present a unique demographically representative dataset of 15k US residents that combines technology use logs with surveys on moral views, human values, and emotional contagion. Combining these data, we provide a holistic view of individuals to model their physical exercise behavior. First, we show which values determine the adoption of Health & Fitness mobile applications, finding that users who prioritize the value of purity and de-emphasize values of conformity, hedonism, and security are more likely to use such apps. Further, we achieve a weighted AUROC of .673 in predicting whether individual exercises, and we also show that the application usage data allows for substantially better classification performance (.608) compared to using basic demographics (.513) or internet browsing data (.546). We also find a strong link of exercise to respondent socioeconomic status, as well as the value of happiness. Using these insights, we propose actionable design guidelines for persuasive technologies targeting health behavior modification.","PeriodicalId":254537,"journal":{"name":"Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128369643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization 第27届ACM用户建模、适应和个性化会议论文集

Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization Pub Date : 1900-01-01 DOI: 10.1145/3320435

引用次数: 1

首页上一页