The aim of this book is to provide an introduction to some of the major advanced statistical techniques most commonly used in the social and behavioural sciences for analysing quantitative data and to do this in as concise and as non-technical a way as possible. The development of relatively easy to use computer programs and software for analysing quantitative data has led not only to the widespread use of these techniques, but also to the increased expectation to apply these techniques to the analysis of one’s own quantitative data where appropriate. To understand the results of these analyses, as well as to be able to critically evaluate them, it is necessary to be familiar with the techniques themselves, as the authors of published research papers are generally expected to take this understanding for granted when describing their own work. Despite the relatively long time these techniques have been used, there are few books providing a relatively non-technical account of them. It is hoped that this text will help to fill this need.