NDLI: Comparison of online social relations in volume vs interaction: a case study of cyworld

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Comparison of online social relations in volume vs interaction: a case study of cyworld

Content Provider	ACM Digital Library
Author	Kwak, Haewoon Ahn, Yong-Yeol Chun, Hyunwoo Moon, Sue Jeong, Hawoong Eom, Young-Ho
Abstract	Online social networking services are among the most popular Internet services according to Alexa.com and have become a key feature in many Internet services. Users interact through various features of online social networking services: making friend relationships, sharing their photos, and writing comments. These friend relationships are expected to become a key to many other features in web services, such as recommendation engines, security measures, online search, and personalization issues. However, we have very limited knowledge on how much interaction actually takes place over friend relationships declared online. A friend relationship only marks the beginning of online interaction. Does the interaction between users follow the declaration of friend relationship? Does a user interact evenly or lopsidedly with friends? We venture to answer these questions in this work. We construct a network from comments written in guestbooks. A node represents a user and a directed edge a comments from a user to another. We call this network an activity network. Previous work on activity networks include phone-call networks [34, 35] and MSN messenger networks [27]. To our best knowledge, this is the first attempt to compare the explicit friend relationship network and implicit activity network. We have analyzed structural characteristics of the activity network and compared them with the friends network. Though the activity network is weighted and directed, its structure is similar to the friend relationship network. We report that the in-degree and out-degree distributions are close to each other and the social interaction through the guestbook is highly reciprocated. When we consider only those links in the activity network that are reciprocated, the degree correlation distribution exhibits much more pronounced assortativity than the friends network and places it close to known social networks. The k-core analysis gives yet another corroborating evidence that the friends network deviates from the known social network and has an unusually large number of highly connected cores. We have delved into the weighted and directed nature of the activity network, and investigated the reciprocity, disparity, and network motifs. We also have observed that peer pressure to stay active online stops building up beyond a certain number of friends. The activity network has shown topological characteristics similar to the friends network, but thanks to its directed and weighted nature, it has allowed us more in-depth analysis of user interaction.
Starting Page	57
Ending Page	70
Page Count	14
File Format	PDF
ISBN	9781605583341
DOI	10.1145/1452520.1452528
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-10-20
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Cyworld Guestbook log K-core Reciprocity Degree correlation Disparity Clustering coefficient Degree distribution Friend relationship Network motif Online social network
Content Type	Text
Resource Type	Article

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