In its first edition this book successfully enabled readers, with little or no prior knowledge of computing or statistics, to develop reliable and valid tests and scales for assessment or research purposes. In this revised second edition Kate Loewenthal has updated the text to include advances in computer software and internet resources. The book contains detailed guidelines for locating and constructing psychological measures, descriptions of popular psychological measures and step-by-step instructions for composing a measure and entering data. Advanced technique such as factor analysis, analysis of covariance and multiple regression analysis are presented for the beginner. A clear, concise and jargon-free primer for all those embarking on fieldwork or research analysis. It will be an invaluable tool for undergraduates and postgraduates in psychology and a useful text for students and professionals in related disciplines.