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Investigating the Observability of Complex Contagion in Empirical Social Networks
Investigating the Observability of Complex Contagion in Empirical Social Networks Clay Fink1, Aurora Schmidt1, Vladimir Barash2, John Kelly2, Christopher Cameron3, Michael Macy3 1Johns Hopkins University Applied Physics Laboratory 2Graphika, Inc. 3Cornell University NSF-IBSS, San Diego, CA, August 1-2, 2016 This work was funded by the Minerva Initiative through the United States Air Force Office of Scientific Research (AFOSR) under grant FA9550-15-1-0036. 1 / 15 Complex contagions and social movements Threshold-based, or complex, models of social contagion may partly explain the initiation of mass mobilizations and social movements 2 / 15 Prior work Threshold models of collective behavior and theoretical predictions (Granovetter 1978, 1973); (Centola, Macy 2007); (Barash, Cameron, Macy 2012) Observational Studies: focus on empirical adoption thresholds Coleman, et al. (1966); Valente (1996): empirical studies of social reinforcement for medical practices and diffusion of innovations; Romero, et al. (2011), Fink, et al. (2016): spread of hashtags on Twitter; State and Adamic (2015): adoption of Equal-Sign profile pictures on Facebook 3 / 15 Overestimation of adoption thresholds b c b c a a e d e d At time t none of a's neighbors By time t + dt all neighbors have adopted have adopted. If a now adopts, what was their actual adoption threshold? 4 / 15 This work We formulate comparable probabilistic models of simple and complex contagion to generate predictions of Twitter hashtag diffusion events Using the follow network of 53K Nigerian 2014 users -
The Long-Term Benefits of Positive Self-Presentation Via Profile
fpsyg-08-01981 November 14, 2017 Time: 17:23 # 1 ORIGINAL RESEARCH published: 15 November 2017 doi: 10.3389/fpsyg.2017.01981 The Long-Term Benefits of Positive Self-Presentation via Profile Pictures, Number of Friends and the Initiation of Relationships on Facebook for Adolescents’ Self-Esteem and the Initiation of Offline Relationships Anna Metzler* and Herbert Scheithauer Developmental Science and Applied Developmental Psychology, Freie Universität Berlin, Berlin, Germany Social networking sites are a substantial part of adolescents’ daily lives. By using a longitudinal approach the current study examined the impact of (a) positive self- presentation, (b) number of friends, and (c) the initiation of online relationships on Facebook on adolescents’ self-esteem and their initiation of offline relationships, as Edited by: well as the mediating role of positive feedback. Questionnaire data were obtained Kai S. Cortina, from 217 adolescents (68% girls, mean age 16.7 years) in two waves. Adolescents’ University of Michigan, United States positive self-presentation and number of friends were found to be related to a higher Reviewed by: Burkhard Gniewosz, frequency of receiving positive feedback, which in turn was negatively associated with University of Salzburg, Austria self-esteem. However, the number of Facebook friends had a positive impact on self- Katherine Fiori, esteem, and the initiation of online relationships positively influenced the initiation of Adelphi University, United States offline relationships over time, demonstrating that Facebook -
Army Acquisition Workforce Dependency on E-Mail for Formal
ARMY ACQUISITION WORKFORCE DEPENDENCY ON E-MAIL FOR FORMAL WORK COORDINATION: FINDINGS AND OPPORTUNITIES FOR WORKFORCE PERFORMANCE IMPROVEMENT THROUGH E-MAIL-BASED SOCIAL NETWORK ANALYSIS KENNETH A. LORENTZEN May 2013 PUBLISHED BY THE DEFENSE ACQUISITION UNIVERSITY PRESS PROJECT ADVISOR: BOB SKERTIC CAPITAL AND NORTHEAST REGION, DAU THE SENIOR SERVICE COLLEGE FELLOWSHIP PROGRAM ABERDEEN PROVING GROUND, MD PAGE LEFT BLANK INTENTIONALLY .ARMY ACQUISITION WORKFORCE DEPENDENCY ON E-MAIL FOR FORMAL WORK COORDINATION: FINDINGS AND OPPORTUNITIES FOR WORKFORCE PERFORMANCE IMPROVEMENT THROUGH E-MAIL-BASED SOCIAL NETWORK ANALYSIS KENNETH A. LORENTZEN May 2013 PUBLISHED BY THE DEFENSE ACQUISITION UNIVERSITY PRESS PROJECT ADVISOR: BOB SKERTIC CAPITAL AND NORTHEAST REGION, DAU THE SENIOR SERVICE COLLEGE FELLOWSHIP PROGRAM ABERDEEN PROVING GROUND, MD PAGE LEFT BLANK INTENTIONALLY ii Table of Contents Table of Contents ............................................................................................................................ ii List of Figures ................................................................................................................................ vi Abstract ......................................................................................................................................... vii Chapter 1—Introduction ................................................................................................................. 1 Background and Motivation ................................................................................................. -
KRUPNICK-DISSERTATION-2016.Pdf (1.542Mb)
I Go, You Go: Searching for Strength and Self in the American Gym The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Krupnick, Joseph Carney. 2016. I Go, You Go: Searching for Strength and Self in the American Gym. Doctoral dissertation, Harvard University, Graduate School of Arts & Sciences. Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493523 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA I Go, You Go: Searching for Strength and Self in the American Gym A Dissertation Presented by Joseph Carney Krupnick to The Department of Sociology in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the subject of Sociology Harvard University Cambridge, Massachusetts April 2016 © 2016 Joseph Carney Krupnick Professor Christopher Winship Joseph Carney Krupnick I Go, You Go: Searching for Strength and Self in the American Gym Abstract This ethnography is based on 48 months of detailed participation, interviews, and observation with active gymgoers at three middle-class gyms in Chicago. It is a study of a particular social institution that, despite its explosion onto the mainstream cultural scene, has surprisingly eluded social-scientific inquiry. Demographically, the group that has been most caught up in the fitness movement are young, single, college-educated Americans living in large city centers. As a study of a particular social world, this research will examine the localized social world of the gym and its young male members, focusing on how their interactions get patterned into negotiated order. -
Friendship Paradox in Growth Networks: Analytical and Empirical Analysis
Sidorov et al. Appl Netw Sci (2021) 6:51 https://doi.org/10.1007/s41109-021-00391-6 Applied Network Science RESEARCH Open Access Friendship paradox in growth networks: analytical and empirical analysis Sergei P. Sidorov* , Sergei V. Mironov and Alexey A. Grigoriev *Correspondence: [email protected] Abstract Saratov State University, Many empirical studies have shown that in social, citation, collaboration, and other Saratov, Russia 410012 types of networks in real world, the degree of almost every node is less than the aver- age degree of its neighbors. This imbalance is well known in sociology as the friendship paradox and states that your friends are more popular than you on average. If we intro- duce a value equal to the ratio of the average degree of the neighbors for a certain node to the degree of this node (which is called the ‘friendship index’, FI), then the FI value of more than 1 for most nodes indicates the presence of the friendship paradox in the network. In this paper, we study the behavior of the FI over time for networks generated by growth network models. We will focus our analysis on two models based on the use of the preferential attachment mechanism: the Barabási–Albert model and the triadic closure model. Using the mean-feld approach, we obtain diferential equa- tions describing the dynamics of changes in the FI over time, and accordingly, after obtaining their solutions, we fnd the expected values of this index over iterations. The results show that the values of FI are decreasing over time for all nodes in both models. -
Understanding Individuals' Attachment to Social Networking Sites
Understanding Individuals’ Attachment to Social Networking Sites: An Empirical Investigation of Three Theories by Eric T. K. Lim M.Sc. (Information Systems), National University of Singapore, 2007 B.Comm. (Hons.), Nanyang Technological University, 2003 Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Segal Graduate School Beedie School of Business Eric T. K. Lim 2013 SIMON FRASER UNIVERSITY Spring 2013 Approval Name: Eric T. K. Lim Degree: Doctor of Philosophy (Business Administration) Title of Thesis: Understanding Individuals’ Attachment to Social Networking Sites: An Empirical Investigation of Three Theories Examining Committee: Chair: Dr. Tom Lawrence Professor, Academic Director, PhD Program Dr. Dianne Cyr Senior Supervisor Professor Dr. Andrew Gemino Co-Supervisor Professor Dr. Leyland Pitt Internal Examiner Professor Dr. Matthew Lee External Examiner Chair Professor Department of Information Systems College of Business City University of Hong Kong Date Defended/Approved: March 27, 2013 ii Partial Copyright Licence iii Ethics Statement iv Abstract Social Networking Sites (SNSs) are a pervasive phenomenon in today’s society. With greater connectivity and interactivity enabled via web technologies, SNSs provide communication platforms for individuals to bridge geographical and temporal differences when making friends, sharing experiences, socializing with others and much more. This thesis therefore endeavors to shed light on this problem by decomposing members’ motives for participating within SNSs into identity-based, bond-based and comparison- based attachments. Each of these forms of attachment in turn affects members’ cooperative and competitive mentality towards participation within SNSs. In addition, it is further posited in this thesis that members’ identity-based, bond-based and comparison- based attachment within SNSs can be induced through the presence of deindividuation, personalization and tournament technologies respectively. -
Mathematical Modeling of Complex Contagion on Clustered Networks
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Frontiers - Publisher Connector ORIGINAL RESEARCH published: 15 September 2015 doi: 10.3389/fphy.2015.00071 Mathematical modeling of complex contagion on clustered networks David J. P. O’Sullivan *, Gary J. O’Keeffe, Peter G. Fennell and James P. Gleeson Mathematics Applications Consortium for Science and Industry, Department of Mathematics and Statistics, University of Limerick, Limerick, Ireland The spreading of behavior, such as the adoption of a new innovation, is influenced by the structure of social networks that interconnect the population. In the experiments of Centola [15], adoption of new behavior was shown to spread further and faster across clustered-lattice networks than across corresponding random networks. This implies that the “complex contagion” effects of social reinforcement are important in such diffusion, in contrast to “simple” contagion models of disease-spread which predict that epidemics would grow more efficiently on random networks than on clustered networks. To accurately model complex contagion on clustered networks remains a challenge because the usual assumptions (e.g., of mean-field theory) regarding tree-like networks are invalidated by the presence of triangles in the network; the triangles are, however, Edited by: crucial to the social reinforcement mechanism, which posits an increased probability of Javier Borge-Holthoefer, a person adopting behavior that has been adopted by two or more neighbors. In this Qatar Computing Research Institute, Qatar paper we modify the analytical approach that was introduced by Hébert-Dufresne et al. Reviewed by: [19], to study disease-spread on clustered networks. -
Associative Diffusion and the Emergence of Cultural Variation
Beyond “Social Contagion”: Associative Diffusion and the Emergence of Cultural Variation∗ Amir Goldberg Stanford University Sarah K. Stein Stanford University July 16, 2018 Abstract Network models of diffusion predominantly think about cultural variation as a prod- uct of social contagion. But culture does not spread like a virus. In this paper, we pro- pose an alternative explanation which we refer to as associative diffusion. Drawing on two insights from research in cognition—that meaning inheres in cognitive associations between concepts, and that such perceived associations constrain people’s actions— we propose a model wherein, rather than beliefs or behaviors per-se, the things being transmitted between individuals are perceptions about what beliefs or behaviors are compatible with one another. Conventional contagion models require an assumption of network segregation to explain cultural variation. In contrast, we demonstrate that the endogenous emergence of cultural differentiation can be entirely attributable to social cognition and does not necessitate a clustered social network or a preexisting division into groups. Moreover, we show that prevailing assumptions about the effects of network topology do not hold when diffusion is associative. ∗Direct all correspondence to Amir Goldberg: [email protected]; 650-725-7926. We thank Rembrand M. Koning, Daniel A. McFarland, Paul DiMaggio, Sarah Soule, John-Paul Ferguson, Jesper Sørensen, Glenn Carroll, Sameer B. Srivastava, Jerker Denrell, Robert Gibbons and participants of the MIT conference on Categories and Shared Mental Models for helpful comments and suggestions. The usual disclaimer applies. Introduction Contemporary societies exhibit remarkable and persistent cultural differences on issues as varied as musical taste and gun control. -
Network Interventions Based on Inversity: Leveraging the Friendship Paradox in Unknown Network Structures
Network Interventions Based on Inversity: Leveraging the Friendship Paradox in Unknown Network Structures Vineet Kumar,1∗ David Krackhardt,2 Scott Feld3 1 Yale School of Management, Yale University. 2Heinz School of Public Policy and Management, Carnegie Mellon University 3 Department of Sociology, College of Liberal Arts, Purdue University. ∗To whom correspondence should be addressed; E-mail: [email protected] Network intervention problems benefit from selecting a more connected node, which is more likely to result in stronger indirect effects. However, in many network contexts, the structure of the network is unknown. We derive and examine the mathematical properties of two distinct “informationally light” strategies, a global strategy and local strategy, that yield higher degree nodes in virtually any network structure. These strategies are based on the friend- ship paradox: “your friends have more friends that you do.” We further iden- tify a novel network property called Inversity, which connects the fundamental parameters of these two strategies. We prove that the sign of Inversity for any given network determines which of the two strategies will be most effective in that network. We assess the performance of these strategies across a wide range of generative network models and real networks, and we show how to leverage network structure through these strategies even when the network structure is unknown. 1 Network-based interventions are of crucial importance in any setting where an individual’s choice or action has a multiplier impact on others, with a wide range of applications. Consider the following network intervention problems: (a) A new infectious disease is spreading through a large population. -
Art As Communication: Y the Impact of Art As a Catalyst for Social Change Cm
capa e contra capa.pdf 1 03/06/2019 10:57:34 POLYTECHNIC INSTITUTE OF LISBON . PORTUGAL C M ART AS COMMUNICATION: Y THE IMPACT OF ART AS A CATALYST FOR SOCIAL CHANGE CM MY CY CMY K Fifteenth International Conference on The Arts in Society Against the Grain: Arts and the Crisis of Democracy NUI Galway Galway, Ireland 24–26 June 2020 Call for Papers We invite proposals for paper presentations, workshops/interactive sessions, posters/exhibits, colloquia, creative practice showcases, virtual posters, or virtual lightning talks. Returning Member Registration We are pleased to oer a Returning Member Registration Discount to delegates who have attended The Arts in Society Conference in the past. Returning research network members receive a discount o the full conference registration rate. ArtsInSociety.com/2020-Conference Conference Partner Fourteenth International Conference on The Arts in Society “Art as Communication: The Impact of Art as a Catalyst for Social Change” 19–21 June 2019 | Polytechnic Institute of Lisbon | Lisbon, Portugal www.artsinsociety.com www.facebook.com/ArtsInSociety @artsinsociety | #ICAIS19 Fourteenth International Conference on the Arts in Society www.artsinsociety.com First published in 2019 in Champaign, Illinois, USA by Common Ground Research Networks, NFP www.cgnetworks.org © 2019 Common Ground Research Networks All rights reserved. Apart from fair dealing for the purpose of study, research, criticism or review as permitted under the applicable copyright legislation, no part of this work may be reproduced by any process without written permission from the publisher. For permissions and other inquiries, please visit the CGScholar Knowledge Base (https://cgscholar.com/cg_support/en). -
Online Hate and Harmful Content
Online Hate and Harmful Content In times of ever-increasing changes in technology and online socio-cultural trends, there is a constant and pressing need for updated knowledge. This book provides the most up-to-date study of online hate speech and harms associated with the Internet. By presenting ground-breaking comparative research and intro- ducing new concepts such as Identity Bubble Reinforcement, it breaks new ground both empirically and theoretically. Sveinung Sandberg, Professor, University of Oslo Over the past few decades, various types of hate material have caused increasing concern. Today, the scope of hate is wider than ever, as easy and often-anonymous access to an enormous amount of online content has opened the Internet up to both use and abuse. By providing possibilities for inexpensive and instantaneous access without ties to geographic location or a user identification system, the Internet has permitted hate groups and individuals espousing hate to transmit their ideas to a worldwide audience. Online Hate and Harmful Content focuses on the role of potentially harmful online content, particularly among young people. This focus is explored through two approaches: first, the commonality of online hate through cross-national survey statistics. This includes a discussion of the various implications of online hate for young people in terms of, for example, subjective wellbeing, trust, self- image and social relationships. Second, the book examines theoretical frame- works from the fields of sociology, social psychology and criminology that are useful for understanding online behaviour and online victimisation. Limitations of past theory are assessed and complemented with a novel theoretical model linking past work to the online environment as it exists today. -
Complex Contagion and the Weakness of Long Ties
Complex Contagion and the Weakness of Long Ties Damon Centola and Michael Macy Cornell University September 12, 2005 Complex Contagion and the Weakness of Long Ties Abstract The strength of weak ties is that they tend to be long – they connect socially distant locations. Recent research on “small worlds” shows that remarkably few long ties are needed to give large and highly clustered populations the “degrees of separation” of a random network, in which information can rapidly diffuse. We test whether this effect of long ties generalizes from simple to complex contagions – those in which the credibility of information or the willingness to adopt an innovation requires independent confirmation from multiple sources. Using Watts and Strogatz’s original small world model, we demonstrate that long ties not only fail to speed up complex contagions, they can even preclude diffusion entirely. Results suggest that the spread of collective actions, social movements, and risky innovations benefit not from ties that are long but from bridges that are wide enough to transmit strong social reinforcement. Balance theory shows how wide bridges might also form in evolving networks, but this turns out to have surprisingly little effect on the propagation of complex contagions. We find that hybrid contagions, in which a critical mass of low-threshold nodes trigger the remaining high threshold nodes, can propagate on perturbed networks. However, of greater importance is the finding that wide bridges are a characteristic feature of spatial networks, which may account in part for the widely observed tendency for social movements to diffuse spatially. 2 “All politics is local.” – Rep.