1 Answers
In a social network analysis , a positive or a negative 'friendship' can be established between two nodes in a network; this results in a signed network. As social interaction between people can be positive or negative, so can be links between the nodes.
When a positive or a negative value is attributed on the relationship between the two nodes, it is called a user evaluation. In social groups, people can like or dislike, respect or disrespect other people in their social groups.
The quality of such connections can be further analysed, as a positive connections can have a positive influence on the whole network and vice versa.
When network connections are not evaluated between the nodes , then such a network is defined as an unsigned network.