Michael Bloor & Jane Frankland 
Focus Groups in Social Research [PDF ebook] 

There is an increasing divergence of focus group practice between social researchers and commercial market researchers. This book addresses the key issues and practical requirements of the social researcher, namely: the kinds of social research issues for which focus groups are most and least suitable; optimum group size and composition; and the designing of focusing exercises, facilitation and appropriate analysis.The authors use examples, drawn from their own focus groups research experience, and provide exercises for further study. They address the three main components of composition, conduct and analysis in focus group research and also acknowledge the increasing impact the Internet has had on social research by covering the role and conduct of `virtual focus groups’.