human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Analyzing Second Screen Based Social Soundtrack of TV Viewers from Diverse Cultural Settings"
  Abstract: The presence of social networks and computing device in form of secondary screens used in conjunction with television plays a significant role in the shift from traditional television to social television (sTV). In this research, we explore the overall secondary screen usage in terms of four conversation patterns each over different cultural social soundtrack related to different TV shows. We process more than 469,000 tweets from second screens for four popular TV shows from four different countries. The ANOVA test results identify significant differences in overall usage of conversational patterns among viewers for TV broadcast across diverse cultures using second screens.

Connected through hyperedge HE-1 (induced by source paper "Twitter power: Tweets as electronic word of mouth"):
  with members:
    - "Predicting Elections with Twitter: What 140 Characters Reveal about Political Sentiment"
    - "Microblog language identification: overcoming the limitations of short, unedited and idiomatic text"
    - "Truthy: mapping the spread of astroturf in microblog streams"
    - "Opinion observer: analyzing and comparing opinions on the Web"
    - "Entity-based Classification of Twitter Messages"
    - "Social Media Campaigns For New Product Introductions"
    - "The Catalyzing Factors of Official Documents Exchange via Microblogging in Public Sectors: A Case Study based on the T-O-E Framework"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science