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AN INTRODUCTION TO SOCIAL NETWORK ANALYSIS
J ade Bailey
Yanny Barney John Cristiani
Rachel Dalton
Larissa Karrow
Chip McKay
James Nixon
David Slater
Anna Terebka
Emily Whiting
David Tindall
OBJECTIVE:
• To provide an introduction to the social network analysis perspective and some key social network concepts.
• To consider how these might be applied to research on forestry communities and other forestry research problems.
SOME TOPICS/QUESTIONS STUDIED BY NETWORK ANALYSTS
• How do innovations become diffused throughout a population?
• Why are some communities able to mobilize for collective action, while others fail to do so?
• How should community social structure be measured?
• How is the provision of social support related to network structure?
• What kinds of structural factors help explain who wins social conflicts?
•Do groups with greater network centrality have more influence in forest land planning processes?
• Do individual with greater network degree feel a greater sense of efficacy – and thus participate more in land planning processes?
• How can we understand the pattern of trade amongst nation states?
• How does structural location affect bargaining power (and outcomes) in exchange networks?
• What is the structural basis for social comparison (e.g., self/other evaluations of competence, justice, etc.)?
• What role do social networks play in helping one to “get a job”?
• What is the relationship between “social capital” and “cultural capital”?
• How is “social capital” related to “co-operation” in social dilemmas?
• How do “micro level interactions” become transformed to “macro level” sociological patterns?
• What is the structural basis of social influence and attitude formation?
• How does one understand the social structure of the global economy?
• What is the social structural basis of friendship
• What is the relationship between network structure and social mobility?
SOME SOCIAL NETWORK CONCEPTS:• points/nodes
• lines/ties• directed/non-directed (arcs/edges)
• ego nets versus whole nets• valued/non-valued• positive/negative• graphs/matrices
• square versus rectangular matrices(adjacency versus incidence matrices)
• bridges/break points• tie strength
• density• geodesics• centrality
(point centrality versus graph centrality)(degree/betweenness/closeness)
• cliques
A Matrix:
A B C DA 0 1 1 0B 1 0 1 0C 1 1 0 1D 0 0 1 0
A Graph:
AB
C
D
A Social Network
socnet01
A
B
C
D
E
FG
A
B
C
D E
F
G
A B C D E F GA 0 0 0 0 0 0 1B 0 0 0 0 0 0 1C 0 0 0 0 0 0 1D 0 0 0 0 0 0 1E 0 0 0 0 0 0 1F 0 0 0 0 0 0 1G 1 1 1 1 1 1 0
A B C D E F GA 0 1 0 0 0 0 1B 1 0 1 0 0 0 0C 0 1 0 1 0 0 0D 0 0 1 0 1 0 0E 0 0 0 1 0 1 0F 0 0 0 0 1 0 1G 1 0 0 0 0 1 0
SOCNET02 SOCNET03
CENTRALITY
DENSITY
D = ______ ln(n-1)/2
To calculate density in percentage terms: D x 100
* Note: the above formula applies to undirected graphs.
SOCNET04 SOCNET05
D = ____ 5
6(6-1)/2 = __ 5
15 = .33 D = ____ 10
6(6-1)/2 = __ 10
15 = .67
A
B
C D
E
F
A
B
C D
E
F
SOCNET04 SOCNET05
A B C D E FA 0 0 0 0 0 1B 0 0 0 0 0 1C 0 0 0 1 0 1D 0 0 1 0 1 0E 0 0 0 1 0 0F 1 1 1 0 0 0
A B C D E FA 0 1 0 0 1 1B 1 0 1 0 0 1C 0 1 0 1 0 1D 0 0 1 0 1 1E 1 0 0 1 0 1F 1 1 1 1 1 0
Centrality: Degree, Betweenness, and Closeness
a
b
c
d
e
SOCNET06
A B C D EA 0 1 0 0 0B 1 0 1 1 0C 0 1 0 1 0D 0 1 1 0 1E 0 0 0 1 0
Detecting Cliques.
a
b
c
d
e
f
g
SOCNET07
A B C D E F GA 0 1 0 0 0 0 0B 1 0 1 1 0 0 0C 0 1 0 1 0 0 0D 0 1 1 0 1 0 0E 0 0 0 1 0 1 1F 0 0 0 0 1 0 0G 0 0 0 0 1 0 0
SOME EXAMPLE SOCIAL NETWORKSURVEY INSTRUMENTS
(Time Permitting)
Some Useful References on Social Network Methods and Perspectives
Berkowitz, S.D. 1982. An Introduction to Structural Analysis: The Network Approach to Social Research. Toronto: Butterworths.
Burt, Ronald. 1980. "Models of Network Structure." Annual Review of Sociology 6:79-141.
Erickson, Bonnie, T.A. Nosanchuk, and Edward Lee. 1981. "Network Sampling in Practice: Some Second Steps." Social Networks, 3:127-36.
Erickson, Bonnie, and T.A. Nosanchuk 1983. "Applied Network Sampling." Social Networks, 5(4):367-382.
Freeman, Linton C. 1978/79. “Centrality in Social Networks: Conceptual Clarification.” Social Networks 1:215-239.
Freeman, Linton C., Douglas R. White, and A. Kimball Romney (Eds.). 1989. Research Methods in Social Network Analysis. Fairfax, VA: George Mason University Press.
Granovetter, Mark. 1977. “Network Sampling. Some First Steps.” American Journal of Sociology, 81:1287-1303.
Knoke, David and James H. Kuklinski. 1982. Network Analysis. Beverly Hills, CA: Sage Publications.
Kontopoulos, Kyriankos. 1993. The Logics of Social Structure. Cambridge: Cambridge University Press.
Marsden, Peter. 1990. "Network Data and Measurement." Annual Review of Sociology 16:435-63.
Marsden, Peter V. and Nan Lin. 1982. Social Structure and Network Analysis. Beverly Hills: Sage Publications.
Pattison, Philippa. 1993. Algebraic Models for Social Networks. Cambridge: Cambridge University Press.
Scott, John. 2000. Social Network Analysis: A Handbook. Second Edition. London: Sage Publications.
D.B. Tindall and Barry Wellman. 2001. "Canada as Social Structure: Social Network Analysis and Canadian Sociology." The Canadian Journal of Sociology, 26(3): 265-308.
Wasserman, Stanley and Joseph Galaskiewicz (Eds.). 1994. Advances in Social Network Analysis. Thousand Oaks, Calif: Sage Publications.
Wasserman, Stanley and Katherine Faust. 1994. Social Network Analysis: Methods and Applications. Cambridge: Cambridge University Press.
Wellman, Barry and S.D. Berkowitz (Eds.). 1988. Social Structures: A Network Approach. Cambridge: Cambridge University Press.