In your study, you will inevitably read a wide range of books and articles. In many of these the terms ‘research method’ and ‘research methodology’ will be used interchangeably, perhaps just using methodology as a more verbose way of saying method. In this book we have been more precise in our use of these terms. Throughout the book we use the term methods to refer to techniques and procedures used to obtain and analyse data. This, therefore, includes questionnaires, observation and interviews as well as both quantitative (statistical) and qualitative (nonstatistical) analysis techniques and, as you have probably gathered from the title, is the main focus of this book. In contrast, the term methodology refers to the theory of how research should be undertaken. We believe that it is important that you have some understanding of this so that you can make an informed choice about your research. For this reason, we also discuss a range of philosophical assumptions upon which research can be based and the implications of these for the method or methods adopted.