We will look at two distinct versions of this process,the'constant comparative method' of Strauss and Corbin(1998) and the more open ( and some claim more true to the original concept of grounded theory) approach:the theoretical sensitivity of Glaser (1978): to take a grounded theory approach to research is to combine theoretical sampling, data collection, design of data collection, data analysis and theory generation in one wholly interactive,iterative and interdependent process