The intuitive background for measures of structural centrality in social networks is reviewed aPzd existing measures are evaluated in terms of their consistency with intuitions and their interpretability. Three distinct intuitive conceptions of centrality are uncovered and existing measures are refined to embody these conceptions. Three measures are… (More)
Structural (or network) analysis has mystified many social scientists. Some have rejected it as mere methodology, which lacks due regard for substantive issues. Some have fled from its unusual terms and techniques, not having played with blocks and graphs since grammar school. Some have dismissed one portion for the whole, saying, for example, that their… (More)
1 The author owes a considerable debt to Morris H. Sunshine who read an earlier draft and made extensive suggestions all of which improved this manuscript.
A new measure of centrality, C,, is introduced. It is based on the concept of network flows. While conceptually similar to Freeman's original measure, Ca, the new measure differs from the original in two important ways. First, C, is defined for both valued and non-valued graphs. This makes C, applicable to a wider variety of network datasets. Second, the… (More)
Galois lattices are introduced as a device to provide a general representation for two mode social network data. It is shown that Galois lattices yield a single visual image of such data in cases where most alternative models produce dual images. The inzage provided by the Galois lattice produces, moreover, an inzage that can suggest useful insights about… (More)
Social network analysts study the structural patterning of the ties that link social actors. For the most part, they seek to uncover two kinds of patterns: (1) those that reveal subsets of actors that are organized into cohesive social groups, and (2) those that reveal subsets of actors that occupy equivalent social positions, or roles. To uncover patterns… (More)
Jacob Moreno [18, 19] introduced the idea of using visual images to reveal important features of social patterning. As he (, pp. 95-96) put it: A process of charting has been devised by the sociometrists, the sociogram, which is more that merely a method of presentation. It is first of all a method of exploration. It makes possible the exploration of… (More)
*We acknowledge the helpful comments of the editor and anonymous reviewers. For their encouragement and suggestions on the research, we thank H. Abstract We describe and illustrate methodology for comparing networks from diverse settings. Our empirical base consists of 42 networks from four kinds of species (humans, non-human primates, non-primate mammals,… (More)