Barbra Teater is Associate Professor in Social Work at the College of Staten Island, City University of New York, USA.John Devaney is Senior Lecturer in Social Work at Queen’s University Belfast, UK.Donald Forrester is Professor of Child and Family Social Work at Cardiff University, UK.Jonathan Scourfield is Professor of Social Work at Cardiff University, UK.John Carpenter is Professor of Social Work & Applied Social Sciences at the University of Bristol, UK.

• Chapter 1 IntroductionChapter 2 Why numbers matter in social workChapter 3 Who is being studied?Chapter 4 What is being studied?Chapter 5 How to describe issues using numbersChapter 6 How to know if a service makes a differenceChapter 7 How to use numbers to describe a sampleChapter 8 How to make a decision with confidenceChapter 9 How to know if two variables are relatedChapter 10 What is the effect of one or more variables on another variable?Chapter 11 What are the key elements of ethical quantitative research?Chapter 12 How to do quantitative research without collecting new dataChapter 13 How to combine qualitative and quantitative methods in social work research.