Practical Social Networks

Question 1

Graph Theory

Answer 1

o Nodes/vertex: which represent individuals

o Links/edge: which represent the connections between individuals

Question 2

Sociogram

Answer 2

Social networks are usually represented visually in a social network diagram

Question 3

Reciprocity

Answer 3

a measure of the number of bi-directional links (e.g. Only if B also trusts A, there is a reciprocal trust relation between the two. The larger the percentage of bi-directional (reciprocal) relations in a network, the higher the reciprocity.)

Question 4

Degree

Answer 4

The “degree” of a note is a measure of his connectiveness, it tells you how many links this node has to other nodes in the network

Question 5

In-degree centrality

Answer 5

is a subcategory of degree reflecting the total number of links pointing towards a single node

Question 6

Out-degree

Answer 6

is another subcategory reflecting the total number of links leaving a single node

Question 7

Transitivity

Answer 7

measures in how far two nodes (A and C) are connected to each other if they are both connected to a third node (B). This measure reflects, for instance, in how far friends of your friends are also your immediate friends

Question 8

Modularity

Answer 8

determines how far a network consists of smaller modules (also called clusters, groups, or communities) Networks with high modularity→many strong connections within a module, less strong connection between modules

Question 9

Small world index

Answer 9

You only need at max 5 people to reach somebody else