Abstract
In this presentation I will introduce the concept of blockmodeling and in particular generalized blockmodeling. Blockmodeling is a technique for finding clusters of units in the network and, at the same time determining ties within and between these clusters. First I will explain on intuitive what blockmodeling is and for what purposes it can be used. This will be illustrated by several examples. Next I will present an overview of different types of or approaches to blockmodeling. In the last part of the presentation I will focus on generalized blockmodeling and in particular to its extensions for valued and multilevel networks.