1. An Introduction to Social Network Analysis

2. OBJECTIVES: An introduction to the social network analysis perspective and some key social network concepts. An introduction to two social network software programs: UCINET (for network analysis) and KrackPlot (for drawing network graphs).

3. SOCIAL NETWORK CONCEPTS: points/nodes lines/ties ego nets versus whole nets valued/non-valued positive/negative graphs/matrices square versus rectangular matrices (adjacency versus incidence matrices) tie strength density centrality (point centrality versus graph centrality) (degree/betweeness/closeness)

4. A Matrix: A B C D A 0 1 1 0 B 1 0 1 0 C 1 1 0 1 D 0 0 1 0 A Graph: A B C D A Social Network socnet01

5. A B C D E F G A B C D E F G A B C D E F G A 0 0 0 0 0 0 1 B 0 0 0 0 0 0 1 C 0 0 0 0 0 0 1 D 0 0 0 0 0 0 1 E 0 0 0 0 0 0 1 F 0 0 0 0 0 0 1 G 1 1 1 1 1 1 0 A B C D E F G A 0 1 0 0 0 0 1 B 1 0 1 0 0 0 0 C 0 1 0 1 0 0 0 D 0 0 1 0 1 0 0 E 0 0 0 1 0 1 0 F 0 0 0 0 1 0 1 G 1 0 0 0 0 1 0 SOCNET02SOCNET03 CENTRALITY

6. DENSITY D = ______2t N(N-1) To calculate density in percentage terms: D x 100

7. SOCNET04 SOCNET05 D = ____ 2(5) 6(6-1) = __ 10 30 =.33D = ____ 2(10) 6(6-1) = __ 20 30 =.67 A B C D E F A B C D E F

8. SOCNET04SOCNET05 A B C D E F A 0 0 0 0 0 1 B 0 0 0 0 0 1 C 0 0 0 1 0 1 D 0 0 1 0 1 0 E 0 0 0 1 0 0 F 1 1 1 0 0 0 A B C D E F A 0 1 0 0 1 1 B 1 0 1 0 0 1 C 0 1 0 1 0 1 D 0 0 1 0 1 1 E 1 0 0 1 0 1 F 1 1 1 1 1 0

9. Another Look at Centrality: Degree, Betweenness, and Closeness a b c d e

10. SOCNET06 A B C D E A 0 1 0 0 0 B 1 0 1 1 0 C 0 1 0 1 0 D 0 1 1 0 1 E 0 0 0 1 0

11. 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.

12. 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.

13. 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.

14. 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.