The investigation covered the three-year period for one cohort of students from their entry to the course to their final degree results. It has to be remembered that the MEd dissertation was a partial requirement for the degree, following on from successful completion of assessed work, and so selection of this one cohort of 87 students (reduced to 79 after eight students withdrew) was perfectly adequate. In fact many good dissertations and even PhD theses have had much smaller samples. In an effort to do a really thorough job, there is sometimes a tendency for researchers to take on more than they can possibly hope to complete in the time allowed, which for part-time Masters degrees is usually about one academic year and for full-time students little more than three months. Many part-time postgraduate researchers also have a job, family or other responsibilities. As there is a limit to the number of hours available in any one day, week or month, common sense has to prevail. The research has to be thorough and well produced, but there is no point in attempting to do enough research for a PhD or to produce the definitive book on your topic if that means you never submit your dissertation.