Suchergebnisse

The concept of contagion has steadily expanded from its original grounding in epidemic disease to describe a vast array of processes that spread across networks, notably social phenomena such as fads, political opinions, the adoption of new technologies, and financial decisions. Traditional models of social contagion have been based on physical analogies with biological contagion, in which the probability that an individual is affected by the contagion grows monotonically with the size of his or her "contact neighborhood"—the number of affected individuals with whom he or she is in contact. Whereas this contact neighborhood hypothesis has formed the underpinning of essentially all current models, it has been challenging to evaluate it due to the difficulty in obtaining detailed data on individual network neighborhoods during the course of a large-scale contagion process. Here we study this question by analyzing the growth of Facebook, a rare example of a social process with genuinely global adoption. We find that the probability of contagion is tightly controlled by the number of connected components in an individual's contact neighborhood, rather than by the actual size of the neighborhood. Surprisingly, once this "structural diversity" is controlled for, the size of the contact neighborhood is in fact generally a negative predictor of contagion. More broadly, our analysis shows how data at the size and resolution of the Facebook network make possible the identification of subtle structural signals that go undetected at smaller scales yet hold pivotal predictive roles for the outcomes of social processes.

An important requisite for improving risk communication practice related to contentious environmental issues is having a better theoretical understanding of how risk perceptions function in real‐world social systems. Our study applied Scherer and Cho's social network contagion theory of risk perception (SNCTRP) to cormorant management (a contentious environmental management issue) in the Great Lakes Basin to: (1) assess contagion effects on cormorant‐related risk perceptions and individual factors believed to influence those perceptions and (2) explore the extent of social contagion in a full network (consisting of interactions between and among experts and laypeople) and three "isolated" models separating different types of interactions from the full network (i.e., expert‐to‐expert, layperson‐to‐layperson, and expert‐to‐layperson). We conducted interviews and administered questionnaires with experts (e.g., natural resource professionals) and laypeople (e.g., recreational and commercial anglers, business owners, bird enthusiasts) engaged in cormorant management in northern Lake Huron (n = 115). Our findings generally support the SNCTRP; however, the scope and scale of social contagion varied considerably based on the variables (e.g., individual risk perception factors), actors (i.e., experts or laypeople), and interactions of interest. Contagion effects were identified more frequently, and were stronger, in the models containing interactions between experts and laypeople than in those models containing only interactions among experts or laypeople.

The construction industry in Ireland, including professional service firms (PSF's) operating therein, are undergoing a period of change and uncertainty driven by economic, demographic, political and technological factors. While considerable evidence exists demonstrating the relationship between environmental turbulence on organisational decision making, there remains a distinct lack of focus on behavioural patterns affecting decision-making process of construction firms. Social contagion (SC) theory asserts that the spread of ideas, attitudes, or behaviour patterns in a group is achieved through imitation and conformity, and is well established within social sciences research, and is increasingly being used to analyse organisational behaviour. However, limited inquiry has been launched into SC theory within construction contexts, particularly within high knowledge intensive PSFs. Using a literature-based meta-synthesis, an exploration as to the usefulness of SC theory in the field of knowledge management in construction is presented. A framework for the analysis of knowledge acquisition using SC theory is provided, as part of an ongoing doctoral study. Based on the interpretations that social contagion research and learning for construction PSF's are in fact two sides of the same social epistemological coin, a theoretical framework for the synthesis of social contagion into the body of theoretically informed research in construction is thus proposed.

Abstract
This paper reviews the implications for research in cultural literacy of the current hypothesis that revolutionary advances in communication technology are inseparable from an over-reliance on emotion, both in the representation of global disaster and human suffering and as a means of manipulating public behaviour in the political and commercial spheres. It explores the view that feeling has become a simulacrum or form of "hyperreality" whose "contagion" through targeted exploitation is an obstacle to deeper understanding of social processes. It summarises the challenges which this presents for research into the nature of cultural literacy by critically considering three current paradigms: affect theory, clinical psychology including neuroscience, and memetics with due regard for recent attempts to model social behaviour through computer-based simulation. Its conclusions are that historical comparisons between past and present of the processes whereby cultural artefacts mediate emotion, combined with highly contextualised empirical fieldwork into their contemporary impact, should be key foci of critical research into cultural literacy, using the full range of technological instruments available.

Interventions aimed at changing the psychological attributes of individuals who form a social system may be limited by reliance on models and methods which do not account for the effects of social interaction on individual attributes. The use of network analysis to model the effects of social contagion on personal attributes is demonstrated in an evaluation of an organizational intervention. Sociometric indices of the norms created by social contagion predicted subjects' self-perceptions better than either expectations imposed on them in small groups or their own observable behavior. Social contagion stabilized the subjects' self-perceptions over time, despite the efforts of the intervention to change their self-perceptions through small group socialization and organizational restructuring. Network models of social contagion may provide useful tools for the design and evaluation of interventions that aim to change the attributes of individuals who form social systems. Further, these models theoretically integrate social relations and social cognition in a manner that helps to bridge the sociological and psychological study of human relations.