"Connectionism" is a 'hands on' introduction to connectionist modeling through practical exercises in different types of connectionist architectures. It explores three different types of connectionist architectures - distributed associative memory, perceptron, and multilayer perceptron. It provides a brief overview of each architecture, a detailed introduction on how to use a program to explore this network, and a series of practical exercises that are designed to highlight the advantages, and disadvantages, of each accompanied by a website that includes practice exercises and software, as well as the files and blank exercise sheets required for performing the exercises. It is designed to be used as a stand-alone volume or alongside "Minds and Machines: Connectionism and Psychological Modeling" (by Michael R.W. Dawson, Blackwell 2004).