http://www.cambridge.org/elt/peterroach An interview with Peter Roach 2009 Cambridge University Press Peter Roach discusses the importance of rhythm in comprehending English. He then goes on to discuss the evidence for and against the stress-timing theory. Peter Roach examines the advantages and disadvantages of the discourse intonation perspective on prosody. Discourse intonation looks at how speakers use intonation interactively; however, many prosodic features are excluded from analysis. Peter Roach describes the ToBI system for transcribing and analysing intonation. He goes on to discuss its advantages and disadvantages of the system. Peter Roach highlights the interrelatedness of stress and intonation with each other and with other prosodic features. He concludes by discussing methods of teaching and learning word stress. Peter Roach discusses changes in phonetics and phonology and how these changes have affected language teaching. He goes on to suggest how new technology might impact on research and pronunciation teaching in the future. Peter Roach discusses the importance of both the form and function of prosodic features. For example, the use of intonation to signal attitude and tempo to signal information status. Peter Roach talks about how a knowledge of phonetics and phonology can help teachers to understand their learners’ difficulties with pronunciation. Peter Roach presents the early days of research into prosody, including David Crystal's continuum for examining prosody and John Laver's framework for analysing voice quality. Peter Roach tells how psychology, English language teaching and his grandchildren have fuelled his interest in phonetics and phonology. He goes on to talk about his own experiences of learning to pronounce a foreign language.