dream event 2: louise cooke
DESCRIPTION
Slides to accompany Dr Louise Cooke's workshop session "An introduction to social network analysis" presented at DREaM Event 2.For more information about the event, please visit http://lisresearch.org/dream-project/dream-event-2-workshop-tuesday-25-october-2011/TRANSCRIPT
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An Introduction to Social Network Analysis
DREaM Workshop
October 2011
Louise Cooke
Senior Lecturer
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This Session
An introduction to Social Network Analysis (SNA)
Data collection, analysis and visualisation Example of SNA project Complete network surveys This afternoon we will review the survey
results.
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Learning objectives
To understand the meaning and potential uses of Social Network Analysis (SNA)
To introduce some core social network concepts and theories
To carry out a practical exercise analysing our own networks
To identify when and for what purposes SNA might be used in information science research.
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Fact finding
Has anyone used SNA in their research? Or plans to do so? What do you understand by SNA?
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Some Network Definitions (OED)
1. Work in which threads, wires or similar materials are arranged in the fashion of a net;
2. A complex collection or system of rivers, canals, railways or the like;
3. An interconnected chain or system of immaterial things (e.g. events);
4. A system of cables for the distribution of electricity;5. A nation-wide broadcasting company; 6. An inter-connected group of people;7. A series of linked computers to make possible
functions such as the transfer of data or the sharing of processing capabilities.
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What is a Network?
A set of dyadic ties all of the same type, among a set of actors (or nodes)
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For example…
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What Is Social Network Analysis?
What is unique about SNA is that it focuses on relationships between entities rather than properties of entities.
There is an underlying perspective that “Structure Matters” and that many social phenomena can be better understood by taking dyadic and structural data into consideration.
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An example of a network diagram
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Knowledge Exchange among EU Countries
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Source: www. Orgnet.comBased on data from 2003-4.
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A Growing Area of Interest
Popular cultureKevin BaconOnline social networking
Business practitionersNew consulting toolsKnowledge management
Academic studyMultiple fields e.g.
communication, epidemiology.
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History of Social Network Analysis
1736- Euler 1930s- Hawthorne studies 1940s Psychologists 1950s & 60s Anthropologists 1970s Rise of Sociologists
Small Worlds, Strength of weak ties
1980s Growth in computation 1990s Ideas spread
UCINET released, spread of network analysis to multiple fields, social capital, embedded ties
2000s Social networking as populist phenomenon.
Papers retrieved from Google Scholar search using “Social Network Analysis” in title, September 2011
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Key Social Network Theories
Small World Phenomenon Strength of Weak Ties Embeddedness Social Capital.
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Relations Among Persons
KinshipFather of, mother of
OtherBoss of, teacher ofFriend of
Cognitive/PerceptiveKnowsAware of what they know
AffectiveLikes, trusts
InteractionsGives advice to, fights
withCitesHas sex with
AffiliationsBelongs to same clubs
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Relations Among Organisations
As corporate entitiesRefer to, Buy from,
sell to, leases too, outsources to
Owns shares of, subsidiary of
Joint ventures, alliances
Regulates.
Via their membersPersonnel flowsInterlocking
directoratesPersonal friendshipsCo-memberships.
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Node Types
Persons Organizations Countries Animals Words Web pages Families Etc.
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Core concepts in SNA
Directed and undirected networks (for example, compare co-authorship with citation)
Paths, components and total connectivity Density and centrality
Degree centralityCloseness centralityBetweenness centrality
Cliques.
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SNA and Knowledge Management
Differences between formal and informal structures
Post-merger integration Impact on information and knowledge flows Identification of bottlenecks, information
brokers, boundary spanners, sub-groups, peripherals
Recognising Communities of Practice.
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Other Uses in Information Science
Citation analysis Internet data mining Technology diffusion and adoption Any others?
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Other Applications
Epidemiology Viral Marketing Internet data mining Diffusion of innovation and new ideas e.g.
political unrest Conflict Management Anti-terrorism and law Enforcement.
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Data Collection
Questionnaire survey (or interview) Observations Using existing datasets, e.g. email
transactions, trade statistics, citation analysis etc.
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Software Tools for Analysis and Visualisation
UCINETAllows for the computational aspects of analysis, including
calculating various measures (e.g., centrality, cohesion, brokerage) among others, as well as hypothesis testing
NetDrawAllows for graphic representation of networks including relations
and attributes Has some analytic capabilities that partially overlap with UCINET
There are others, generally for particular nichesPajek (Better at computational analysis of really large networks)E-Net (analyzing ego networks)KeyPlayer (influencing or disrupting networks).
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A Practical Example: Research Networks - by University (1)
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Research Networks – by University (2)
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Some Ethical Issues
Data cannot usually be collected anonymously, but it can be presented anonymously
Relationship ties can be a sensitive issue! Accurate interpretation of the meaning behind
the data is key.
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Now please complete your questionnaire
Demographic data Knowledge and expertise Acquaintanceship ties Research ties
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References & useful sources of further information
www.analytictech.com (UCINET software)Cheuk, B (2007) SNA: Its application to facilitate knowledge transfer. Business
Information Review, 24 (3) 170-176.Cross, R & Parker, A (2004) The Hidden Power of Social Networks: How work really
gets done in organizations. Boston, Ma., Harvard University Press.DeJordy, R. (2006) Social Network Analysis. Research Methods Summer School,
University of Essex, July 2006.Hanneman, R.A. & Riddle, M. Introduction to Social Network Methods. Free internet
resource based on Ucinet at http://www.faculty.ucr.edu/~hanneman/nettext/Johnson, B & Oppenheim, C (2007) How socially connected are citers to those that
they cite? Journal of Documentation, 63 (5) 609-637.Kilduff, M & Tsai, W (2003) Social Networks and Organizations. London, Sage.Orgnet.com Social Network Analysis software & services for organizations,
communities, and their consultants. http://www.orgnet.com/Otte, E & Rousseau, R (2002) SNA: a powerful strategy, also for the information
sciences. Journal of Information Science, 28 (6) 441-453.
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Summary of important points
SNA is used to analyse the relationship patterns between entities
It can be used to analyse networks of very different kinds (and not just those that we understand as ‘social’)
It is based on mathematical sociology and graph theory
In organisations, it can help us to diagnose and understand information and knowledge flows and bottlenecks.
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To follow…
Results of our survey
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Any Questions?
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