Abstract
While existing studies on YouTube’s massive user-generated video content have mostly focused on the analysis of videos, their characteristics, and network properties, little attention has been paid to the analysis of users’ long-term behavior as it relates to the roles they self-define and (explicitly or not) play in the site. In this chapter, we present a statistical analysis of aggregated user behavior in YouTube from the perspective of user categories, a feature that allows people to ascribe to popular roles and to potentially reach certain communities. Using a sample of 270,000 users, we found that a high level of interaction and participation is concentrated on a relatively small, yet significant, group of users, following recognizable patterns of personal and social involvement. Based on our analysis, we also show that by using simple behavioral features from user profiles, people can be automatically classified according to their category with accuracy rates of up to 73%.
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Notes
- 1.
The two-sample KS test is a non-parametric method which is sensitive to differences in both location and shape of the empirical cumulative distribution functions (CDFs) of two samples, and makes no assumption about the distribution of data. The null hypothesis of this statistic is that the samples are drawn from the same distribution. Thus, a KS test that yields a p-value less than a specified α, leads to the rejection of the null hypothesis, and favors the hypothesis that distributions are different [6].
- 2.
The two-proportion z-test is used to compare proportions of two independent binomial samples. The null hypothesis of this statistic is that the two proportions are equal. Thus, a two-proportion z-test giving a p-value less than a specific α (typically 0.05), leads to the rejection of the null hypothesis, and indicates that the proportions are different [18].
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Acknowledgements
We thank for the support provided by the Swiss National Science Foundation (SNSF) through the Swiss National Center of Competence in Research (NCCR) on Interactive Multimodal Information Management (IM)2.
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Biel, JI., Gatica-Perez, D. (2011). Call Me Guru: User Categories and Large-Scale Behavior in YouTube. In: Hoi, S., Luo, J., Boll, S., Xu, D., Jin, R., King, I. (eds) Social Media Modeling and Computing. Springer, London. https://doi.org/10.1007/978-0-85729-436-4_8
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