Introduction In the course of this book, both by implication and from time to time explicitly, we have touched on the use of research methods in combination with others. By and large, however, the preceding chapters have essentially treated these methods and techniques as discrete, in order to bring out their main characteristics and applications (rather like discussing individual language skills before considering ways in which they might be integrated, though the parallel should not be pushed too far). Case study research is an obvious exception, being more likely than not to amalgamate two or more procedures - interviews, diaries, observations, and so on.