The author is a Professor of Educational and Social Research and has carried out research in the sociology of education and the methodological issues surrounding social enquiry. The book describes the relationship between research, politics and policymaking and other forms of social practice. The rise of evidence-based research practice increased demands for experimental research that would directly inform policymaking and practice. However, this encountered many troubles in the following years. The key questions that the book explores include - is scientific research evidence-based, what counts as evidence for evidence-based practice, is social measurement possible and is it necessary. The book also discusses the case for action research, the nature of systematic reviews and the process of qualitative synthesis. It is a valuable source for both academic and professionals involved in the field of research and policymaking.