In which of the following types of studies would the principle of data saturation be used? Select all that apply
A) Grounded theory study
B) Ethnography
C) Phenomenological study
D) Clinical trial
A, B, C
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Samples in qualitative studies that include grounded theory, ethnography, and phenomenology are typically small and based on information needs. A guiding principle is data saturation, which involves sampling to the point at which no new information is obtained and redundancy is achieved. In clinical situations, for example, it is often appropriate to let people talk freely about their problems and concerns, allowing them to take much of the initiative in directing the flow of conversation. Clinical trials would not employ the principle of data saturation.
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