Practitioners across the caring professions increasingly need to know where evidence can be found and to evaluate different forms of evidence with a critical eye. This invaluable collection includes exemplars of a wide range of research techniques and provides a critical commentary for each. The commentary is designed to tackle jargon and demystify the text, highlighting the compromises that need to be made in real world research designs and the complexity of controlling relevant variables. The book seeks to underline the challenges of interpreting and generalising results both for the researchers and for those who fund their work. This is a set book for the Open University course K302 Critical Practice in Health and Social Care.