FreshBiostats, a blog in Biostatistics: assessment of impact metrics and social network analysis http://freshbiostats.wordpress.com/ Contagious obesity? Transmission via social networks of personal characteristics, e.g., obesity, smoking cessation, happiness, and loneliness. 2 Homophily & Confounding Lyons, R. (2011). The Spread of Evidence-Poor Medicine via Flawed Social-Network Analysis. Statistics, Politics, and Policy, Volume 2, Issue 1. +57% +13% Image property of the NY times Published: October 1, 2009 3 4 Retrieved from Inmaps on 10/06/2014 The blog 50.947 visits 162 countries 72 posts 17 comments 47 reg. blog followers 283 twitter followers 168 tweets 5 Retrieved from Wordpress on 19/07/2014 Impact metrics 1. Metrics-‐based research assessment 2.  Webometrics/Cybermetrics 3.  Altmetrics 6 Short survey 7 Short survey Results Retrieved from Wordpress on 19/07/2014 Social network analysis UCINET 6 •  N=374 comprising TwiAer friends and followers •  n=60 •  Sample does not include authors to avoid potenHal biases 9 Retrieved from Twitter on 15/06/2014 Egonetwork UCINET 6 10 Retrieved from Twitter on 15/06/2014 Egonetwork without FB UCINET 6 11 Retrieved from Twitter on 15/06/2014 Further SNA Results Julian Wolf son Targeted Learning Targeted Learning The Fif th Moment Dr. Diego Kuonen Statistical L. Collado TorresSignal Riccardo Bonf ichi Brian Caf f o Philip Sedgwick Julian Wolf son Nicholas Horton Eric Cai My crof t Holmes RSS ArzuHorton KANIK Conf erence Nicholas Alastair Rushworth StatSof t Ltd Stats Prof essor Wiley Stats Dr. Diego Kuonen Alastair Rushworth predexa Umberto Picchini Philip Sedgwick StatSof t Ltd James Stewart Umberto Picchini Brian Caf f o Stats Prof essor Riccardo Bonf StatsJobs.com ichi Dr. H Jozef ien Buy ze EmilioL.L.Cano Cano Emilio Michael Frisby Jade Page Arzu KANIK Statistical Why Analy Stats? Signal Stats Solutions ResearchBlogging.org Analy Stats Solutions FreshBiostats Juan José Gibaja Fabrizio Messina Eric Cai ChetanDr. Prajapati H Kristof f er Magnusson StatsJobs.com The Fif AmStat Philadelphia Summer School th Moment Juan José Gibaja Conf erence Jozef ien Buy zeWiley Stats RSS Alejandro kaushal chaudhary Brennan Kahan Nick Bry ce Why Stats? Gustaf Ry dev ik AmStat Philadelphia Ness Sandov al Kristie Tay lor - Pedro Femia CBat predexa bay esRules James Stewart Estaidea L. Collado Torres Miguel Ángel Montero Michael Frisby Dav id guede Jade Page FreshBiostats abbey diaz bay esRules Alejandro Nick Bry ce My crof t Holmes Ferran A. Rodríguez Dav id guede Estadística Mat UV Alice Duv auchelle Estaidea Miguel Ángel Montero Nathan O'Connell Arturo Martí Chetan Prajapati Brennan Kahan susanders Ness Sandov al Kristie Tay lor Arturo Martí Fabrizio Messina kaushal chaudhary - Pedro Femia - ResearchBlogging.org CBat Ferran A. Rodríguez John Furey Raul Ey zaguirre Estadística Mat UV Gustaf Kristof Ry f er dev Magnusson ik abbeyMartina diaz Alice Duv auchelle Nathan O'Connell susanders John Furey Raul Ey zaguirre Martina Summer School UCINET 6 12 G&F brokerage roles Image property of Elisa Bellotti How often does a node enact each kind of brokerage role? 13 Brokerage roles by country FreshBiostats (group 1) Count 1 2 3 4 Coord 89 174 22 10 inator 173 229 36 12 2 20 32 2 2 3 10 12 2 0 4 40 64 8 1 5 116 183 24 8 6 10 15 2 1 7 20 28 3 2 8 20 31 4 2 9 10 16 2 1 10 10 15 2 1 11 10 16 2 1 12 20 31 4 2 13 9 15 2 1 Gatekeeper 468 5 6 7 8 9 10 44 116 11 22 22 11 70 177 12 31 34 14 8 22 2 3 4 2 1 8 0 1 2 1 10 39 4 7 8 3 44 109 10 23 24 11 4 10 0 2 2 1 8 19 2 2 4 2 8 21 1 4 2 2 4 11 1 2 2 0 4 9 1 2 2 1 4 11 1 2 2 1 8 22 1 4 4 2 4 10 1 1 2 1 Liaison 1491 11 11 17 2 1 4 11 1 2 2 1 0 1 2 1 12 13 14 11 0 8 462 Repre 18 0 15 sent. 2 0 2 1 0 1 4 0 4 12 0 10 1 0 0 2 0 2 2 0 2 1 0 1 1 0 1 0 0 1 2 0 2 1 0 0 354 Consultant 14 Brokerage roles by type FreshBiostats (group 1) Type 1 2 3 4 29 125 50 48 Coord inator 149 527 230 246 3 54 197 72 86 4 52 213 84 73 5 10 33 14 10 6 4 17 8 5 7 11 38 18 17 8 6 22 9 10 9 5 16 9 8 10 6 22 9 10 Gatekeeper 297 5 12 51 18 18 1 2 2 2 2 2 6 7 4 11 22 50 9 18 7 19 1 3 0 2 2 2 1 2 0 2 1 2 Liaison 8 0 0 0 0 0 0 0 0 0 0 1608 9 10 5 0 255 Repre 20 0 sent. 8 0 7 0 1 0 0 0 1 0 1 0 0 0 1 0 675 Consultant 15 Other nodes roles UCINET 6 16 Metrics or indicators? David Spiegehalter @Understanding Uncertainty: “My highest cited paper clocks in at over 14,000 [citaDons], and yet it has roughly 150 authors and to be honest, I have forgoIen what if anything I contributed to it…” “Or the WinBugs user manuals for soQware [have] around 5,000 citaDons that do not appear in WoS” 17 Conclusion 18 Sources: Wikipedia & http://prezi.com/nbt1a9ly7mbm/cardumenes-de-peces/ Further work o  Study in detail the clusters of the global network o  Study the evoluHon over Hme of the blog´s networks o  MulH-‐group comparisons with the networks from similar online resources 19 References o  Bonetta, L. (2007). Scientists enter the blogosphere. Cell, 129 (3): 443-445. o  Borgatti, S.P., Everett, M.G., Johnson, J.C. (2013). Analyzing social networks. SAGE Publications Ltd. o  Gould, J., Fernández, J. (1989). Structures of mediation: A formal approach to brokerage in transaction networks. Sociological Methodology 19: 89-126. o  Reichardt, J., Bornholdt, S. (2004). Statistical mechanics of community detection. Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), 69: 26113-26121. 20 thank you! any questions? [email protected] [email protected] 21