Latent variable models are used in many areas of the social and behavioural sciences, and the increasing availability of computer packages for fitting such models is likely to increase their popularity. This book attempts to introduce such models to applied statisticians and research workers interested in exploring the structure of covari- ance and correlation matrices in terms of a small number of unob- servable constructs. The emphasis is on the practical application of the procedures rather than on detailed discussion of their mathe- matical and statistical properties. It is assumed that...