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10 Articles in: Research Methods. View More. Surveys are the most commonly used tool in sociological research, whether in the form of a questionnaire, interview, or telephone poll. Learn more about surveys here.
Several methods of zero-phase conversion are commonly applied. 1  The commonest method is the so-called statistical approach. Here a window of the input data is defined around the target region. 2  A simple phase rotation may be applied to improve well ties.