What is Social Network Analysis?

2. What is Social Network Analysis?

4. Structural Intuitions: • Alex Bavelas—Productivity, Leadership and Morale • Torsten Hagerstrand—Information & Space • Elizabeth Bott—Support and Control • Peter Blau—Homophily • Mark Granovetter—Social Organization

6. Bavelas’ Centrality

7. Bavelas’ Apparatus

8. The greater the centrality: • The faster the solution • The fewer errors • The lower the morale

9. Structural Intuitions: • Alex Bavelas—Productivity, Leadership and Morale • Torsten Hagerstrand—Information & Space • Elizabeth Bott—Support and Control • Peter Blau—Homophily • Mark Granovetter—Social Organization

11. Census data on the spread of an innovation in space • Wave-like patterning • Assumed pair-wise process • Distance/decay in contact • Estimated by addresses of brides and grooms Hagerstrand—Spatial Diffusion

12. Structural Intuitions: • Alex Bavelas—Productivity, Leadership and Morale • Torsten Hagerstrand—Information & Space • Elizabeth Bott—Support and Control • Peter Blau—Homophily • Mark Granovetter—Social Organization

14. Loose Knit Tight Knit Bott: Support and Control

15. Loose Knit Tight Knit Bott: Support and Control

17. Structural Intuitions: • Alex Bavelas—Productivity, Leadership and Morale • Torsten Hagerstrand—Information & Space • Elizabeth Bott—Support and Control • Peter Blau—Homophily • Mark Granovetter—Social Organization

19. Blau’s Homophily [Moreno Data]

20. Structural Intuitions: • Alex Bavelas—Productivity, Leadership and Morale • Torsten Hagerstrand—Information & Space • Elizabeth Bott—Support and Control • Peter Blau—Homophily • Mark Granovetter—Social Organization

25. BREAK

32. Graph Ordered pair: G = <A, R>

33. Symmetric If <a1 , a 2>  R then <a2 , a 1>  R For all A, if a1 R a 2then a2 R a 1

34. Nonsymmetric • For at least 1 element in A, a1 R a 2 anda2 R a 1 • For at least 1 element in A, a1 R a 2 anda2 ~R a 1

35. Binary 1922 Almack Valued 1999 Brewer & Webster

36. Existing Records 1986Breiger & Pattison Subjects’ Reports 1992Fagan 1999Brewer & Webster

37. Systematic Observation 1988Freeman, Freeman & Michaelson Recording Devices 2004Bulkley & van Alstyne

38. Experimental Manipulation 1951Leavitt Ethnographic Notes 1956Bott

39. Free Listing 1999Brewer & Webster Forced Choice 1999Brewer & Webster

40. Card Sorts 1988Freeman, Freeman & Michaelson Spatial Tasks 1994Freeman

41. Reports about Self 1922Almack Reports about Everyone 1987Krackhardt

42. Systematically Compared 1976Killworth & Bernard