在线社交网络群体发现研究进展

群体是在线社交网络重要的中观组织。群体发现不仅有重要的理论意义,还推动了在线社交网络的应用与发展,有广泛的应用前景。该文总结论述了在线社交网络群体发现的研究进展。在分析群体形成机理的基础上定义在线社交网络群体,并介绍群体发现问题。根据挖掘群体时采用的不同特征,该文分别阐述基于个体属性特征的群体发现方法和综合属性与结构特征的群体发现方法。随后从特征选取和检测算法两个方面重点介绍了恶意行为群体的发现方法。最后,对群体发现进一步的研究方向进行展望。     

Research on Chinese social media users’ communication behaviors during public emergency events

In recent years, China has been in a period of social transition. Public emergency events have occurred frequently, and social media have developed rapidly. Social media users in China not only represent traditional audiences but also play an increasingly important role in crisis communication during public emergency events by expressing their views, discussing events with others and sharing information both online and offline. According to national telephone survey data from China, nearly two-thirds of the respondents engaged in communication behaviors during public emergency events, and more than forty percent of those users communicated by social media. Hundreds of millions of Chinese social media users are becoming the driving force of the public opinion field. To better understand social media users’ online information dissemination behaviors and influencing factors, we developed the hierarchical logistic regression model and observed that demographic variables (gender and age), social media use, people’s concerns regarding public emergencies and people’s need to monitor the government’s performance during public emergencies significantly influence online information dissemination behaviors. Our study has practical significance and academic value for understanding the online public opinion field and online political participation in China.     

The influence of online forum and SNS use on online political discussion in China: Assessing “Spirals of Trust”

Echoing the significance of mobile online networks in fueling the Arab Spring, the present study seeks to better understand social media influences in China by studying political activity among Chinese netizens. A survey of Chinese college students examines the influence of online social networks in the context of political attitudes and political participation. Study results reveal a moderate but positive impact of online forum and social networking site use on online political discussion. Implications for political change in the social networking era, particularly in regimes that practice Internet censorship like China’s, are discussed.     

The future of online social networks (OSN): A measurement analysis using social media tools and application

The explosion of online social networks (OSN) has created an interactive and communicative global phenomenon that has enabled billions of users to connect to other individuals on Facebook and Twitter but also with media sharing platforms such as Instagram and Pinterest. This study examines the current use of social media platforms and explores the factors that help define the long term implications of social media. The study employed a nationwide survey collected from 2012 to 2013 and is available from the PEW Internet research center of more than 2000 American citizens’ behaviour towards OSNs. The results revealed strong predictors of OSN that form the connections among users; and the core significant predictors: age, gender and access to mobile Internet that foster the adoption and usage of OSN in the future. Furthermore, online activities such as posting video content on social networks also highlighted the online usage patterns and trends of using social media to actively engage with other users more willingly than text. This is due to the viral nature of online media sharing on social media and as part of the video viewing and creating experience. An outline of practical implications of the findings and areas for future research is also discussed.     

Exchanging social support on online teacher groups: Relation to teacher self-efficacy

The present study explored the relation between exchanging social support on online teacher groups and teacher self-efficacy. An online survey was conducted inside a massive Facebook teacher group, and 584 elementary school teachers provided information regarding Facebook use, self-efficacy for creative teaching, and the extent to which they provided and received support on the online teacher group. Results showed that teacher self-efficacy varied as a function of years of teaching experience, length of group membership, and the extent to which teachers provided and received social support on the online teacher group. Furthermore, the providing of online support predicted teacher self-efficacy after taking into account the effects of teaching experience and group membership. The findings are discussed in terms of the features and importance of social support exchange on online teacher support groups.     

Online consumer review and group-buying participation: The mediating effects of consumer beliefs

This paper aims to examining the extent to which online consumer review (OCR) influences consumer beliefs and participation in online group-buying. We design a conceptual model and propose several hypotheses to articulate the relevant causal relationships in line with the social exchange theory and the theory of institution-based trust. The empirical results unveil that OCR significantly influences consumer perceptions in terms of perceived effectiveness, perceived structure assurance, and familiarity with intermediary, while consumer satisfaction and trust in intermediary significantly mediate the relationships between consumer perceptions and continuance use of online group-buying. The present study advances the theoretical understanding of the impact of consumer review and the mediating effects of consumer beliefs in the context of online group-buying. The findings make contributions to research and practice with managerial implications for the application of social media in electronic commerce and mobile commerce.     

Show your best self(ie): An exploratory study on selfie-related motivations and behavior in emerging adulthood

Although self-presentation has been studied for decades, social networking sites (SNS) such as Facebook have produced novel opportunities for visual online self-presentation. Posting selfies is currently a popular mode of consciously constructing visual online self-presentations, yet most prior research is limited to selfie-posting alone. This study aimed to profile selfie-makers’ motivations and behavior, and examine the extent to which underlying mechanisms preceding selfie-posting are interconnected. Results of a survey (N?=?224; 79.9% females; M_age?=?21.66, SD_age?=?2.08) regarding selfie-behavior on SNS (e.g., Facebook and Instagram) characterized selfie-makers in emerging adulthood as mainly concerned with the social aspects of selfies. Entertainment and moment-retention were identified as main motivations for selfie-making. Findings supported the proposed Selfie-Stadium Model, representing various steps of selfie-taking and underlying motives as well as selection and editing before actual posting. This study on profiling selfie-makers and their self-presentation taps into a fairly new media use research domain.     

Do social media literacy skills help in combating fake news spread? Modelling the moderating role of social media literacy skills in the relationship between rational choice factors and fake news sharing behaviour

This study modelled the rational factors that predict fake news sharing behaviour. It also tested the moderating role of social media literacy skills. The focus was on social media users in Nigeria. An online survey was conducted to gather the responses from participants across Nigerian geopolitical zones. Structural equation modelling (SEM) Smart PLS 3.6 was used to analyse the data. We found that information sharing, the news finds me perception, trust in social media and status-seeking lead to fake news sharing among social media users in Nigeria. Specifically, trust in social media and status-seeking had a greater effect on fake news sharing behaviour. We also found that social media literacy skills significantly moderate the relationship between information sharing, status-seeking, the news finds me perception, trust in social media and fake news sharing in such a way that the effects/relationships are stronger among those with low social media literacy skills. This outcome contributes to theory and practice which was highlighted in the concluding aspect of this study.     

The effects of social media virality metrics,message framing,and perceived susceptibility on cancer screening intention: The mediating role of fear

Social media platforms are increasingly playing a vital role in the process of dissemination and sharing of health information. The present study investigated whether and how online health information and virality metrics associated with social media platforms jointly shape persuasive outcomes in the context of cancer screening promotion. One important area of research on cancer screening promotion concerns loss-versus-gain message framing, which has highlighted the persuasive advantage of loss framing relative to gain framing. Given this, we examined how social media virality metrics, loss-versus-gain message framing, and perceived susceptibility influence message-evoked fear and intention to perform colonoscopy in the context of colorectal cancer screening. Results from an online experiment showed that loss framing, relative to gain framing, led to greater message-evoked fear when the message was presented with high-virality metrics, and this pattern was particularly pronounced among those with low perceived susceptibility to colorectal cancer. Furthermore, a formal test of moderated mediation showed that the indirect effect of loss framing on colonoscopy intention through message-evoked fear was significantly moderated by perceived susceptibility to colorectal cancer when the message was presented with high-virality metrics. Theoretical and practical implications of these findings are discussed.     

Measuring consumer perception of social media marketing activities in e-commerce industry: Scale development & validation

The internet has changed the nature of shopping in the past two decades, which has supported the proliferation of e-commerce sites and thus shopping has shifted to e-shopping. Also, customers use social media to gain information on preferred products with the best price options, as social media provides shoppers a voice, and facilitate them to interact and share their opinion worldwide. Moreover, social media is extensively adopted platform for e-commerce. Although, social media marketing has achieved wide acceptance in business, especially in e-commerce, there is no scale in the extant literature to measure perceived social media marketing activities (SMMA) in an e-commerce context. Therefore, this study develops and validates a 15-item, five-dimensional scale for measuring perceived SMMA of e-commerce based on extant literature on e-commerce and social media marketing and five different studies conducted in this research. The scale revealed comprehensive psychometric characteristics as per the results from the diverse reliability and validity checks. It was revealed that perceived SMMA positively influenced purchase intention and brand equity; which endorses the nomological validity of the developed scale. The new scale provides both theoretical as well as managerial implications along with the avenues for forthcoming research.     

Examining the roles of social media and alternative media in social movement participation: A study of Hong Kong’s Umbrella Movement

During the recent wave of pro-democracy movement across the world, new media technologies play a vital role in mobilizing participants. Much scholarly attention has been paid to the role of social media in empowering grassroots movements, but the rise of alternative media was somehow ignored. This study examines the impacts of social media and alternative media on social movement participation. The data came from a survey of 769 students from eight public universities in Hong Kong at the height of the Umbrella Movement. The findings revealed that acquisition of political information from social media and alternative media is associated with social movement participation through different mechanisms. Specifically, social media serve as an echo chamber where people are motivated to participate by perceiving a homogeneous opinion climate and forming a pro-protest attitude. In contrast, alternative media serve as an attitude intensifier to facilitate social movement participation.     

Saving lives using social media: Analysis of the role of twitter for personal blood donation requests and dissemination

Social media has an impact on many aspects of human life ranging from sharing personal information to revolutionizing political systems of entire countries. One not so well studied aspect of social media is analyzing its usage and efficacy in healthcare, particularly in developing countries which lack state-of-the-art healthcare systems and processes. In such countries, social media may be used to facilitate patient-centric healthcare by involving the patient for fulfilling personal healthcare needs. This article provides an in-depth analysis of one such need, that is, how people use social media to request for blood donations. We study the request and dissemination behavior of people using social media to fulfill blood donation requests. We focus on twitter, and blood donation accounts in India. Our study reveals that each of the seven twitter accounts we studied have a large followership of more than 35,000 users on an average and receive a substantial number (more than 900) of donation requests in a day on an average. We analyze the requests in various ways to present an outlook for healthcare providers to make their systems more patient-centric through a better understanding of the needs of people requesting for blood donations. Our study also identifies areas where future social media enabled automated healthcare systems can focus on the needs of individual patients. These systems can provide support for saving more lives by reducing the gap between blood donors and the people in need.