Tie strength

Question 1

Embeddedness

Answer 1

the number of common neighbors shared by the two endpoints of the edge

Question 2

Neighborhood overlap

Answer 2

for an edge connecting A and B, the ratio -

number of nodes who are neighbors of both A and B: number of nodes who are neighbors of at least one of A or B

Question 3

Local bridge

Answer 3

an edge joining nodes A and B only if A and B have no friends in common

Question 4

Span

Answer 4

span of a local bridge is the distance its endpoints would be from each other if the edge were deleted

Question 5

Triadic closure

Answer 5

If two people in a social network have a friend in common, there is an increased likelihood that they too will becoma friends at some point in the future

Question 6

Clustering coefficient

Answer 6

the probability that two randomly selected friends of node A are friends with each other

Question 7

Structural hole

Answer 7

the “empty space” between 2 sets of nodes that do not otherwise interact
advantage 1: early access to info originating in multiple noninteracting parts
advantage 2: unexpected synthesis of multiple ideas
advantage 3: social “gatekeeping”…regulates access
Disadvantage: less embedded, less protected