Ed Nicholas Mays, Catherine Pope BMJ Publishing Group, pounds sterling10.95, pp 79 ISBN 0 7279 1013 2Why does evidence from meticulous trials have so little impact on clinical practice? How do the ways in which clinical teams coordinate their work affect patients' outcomes? Why do many people accept advice on “healthy living” but not put it into practice? These and many similar questions relate to the perplexing gaps between research evidence and its effective use, between health services and outcomes, and between personal knowledge and behaviour. The two methods that dominate medical research—measurement and experiment—offer the best means of evaluating specific interventions, but cannot deal with the above questions.Current over reliance on measuring leaves large areas of inquiry either poorly researched with inappropriate methods or ignored; it is as restrictive as the use of only two drugs for a range of conditions that require the selective use of a dozen remedies.Qualitative Research in Health Care, a collection of papers first published in the BMJ, gives a concise introduction to the discriminating use of a wider range of methods. It discusses the main uses, benefits, and pitfalls of social science methods: systematic observation; in depth interviews; focus groups; consensus methods; and case studies which explore, explain, or describe complex examples of actual practice. All these methods can analyse the ambiguous, contradictory responses which inevitably emerge when research moves beyond superficial inquiry. The methods can prepare for later quantitative work, or supplement it, or be used independently.The editors discuss questions integral to every research method, such as how rigorous and representative the work is, how valid, how reliable, and how impartial. They show that qualitative and quantitative methods broadly overlap and complement one another. The crucial question is not “What is the best research method?” but “What is the best method for answering this question?” For anyone who is unconvinced of the value of “soft” research, the appendix debates the relative merits of qualitative and quantitative work.Only five methods are covered, and little is said about the importance of theory. However, this reader friendly book contains much information of value to health care practitioners, managers, and researchers, and to anyone who is the subject of research or audit, or who uses (or ignores) research evidence. If members of ethics, funding, and editorial committees, who assess research protocols and reports, noted the book's themes and allowed more resources and journal space for qualitative research, then knowledge about health care could be considerably enriched.—PRISCILLA ALDERSON, senior research officer, Institute of Education, University of London