The main attraction of questionnaires is their unprecedented efficiency in terms of (a) researcher time, (b) researcher effort, and (c) financial resources. By administering a questionnaire to a group of people, one can collect a huge amount of information in less than an hour, and the personal investment required will be a fraction of what would have been needed for, say, interviewing the same number of people. Furthermore, if the questionnaire is well constructed, processing the data can also be fast and relatively straightforward, especially by using some modern computer software. These cost-benefit considerations are very important, particularly for all those who are doing research in addition to having a full-time job (Gillham, 2000).
Cost-effectiveness is not the only advantage of questionnaires. They are also very versatile, which means that they can be used successfully with a variety of people in a variety of situations targeting a variety of topics. As a result, the vast majority of research projects in the behavioral and social sciences involve at one stage or another collecting some sort of questionnaire data.
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