The Random Breath Test Study: Research Questions and Method

This chapter has two objectives: to enumerate in detail the research questions for the study of random breath testing in New South Wales and to describe the methods. Methods of analysis as well as the sample design and the questions in the interview schedule are described. Particular emphasis is placed on describing the rationale for each step in the research and relating decisions about method to the methodological issues discussed in Chapter 3. The problems involved in constructing reliable and stable measures are given close attention throughout the chapter. Since the study has a longitudinal component, it is possible to determine the test-retest reliabilities of some of the key measures.