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A gap in the literature is a research question relevant to a given domain that has not been answered adequately or at all in existing peer-reviewed scholarship. A gap in theliterature may emerge if: The question has not been addressed in a given domain, although it may have been answered in a similar or related area.
A research problem is a statement about an area of concern, a condition to be improved upon, a difficulty to be eliminated, or a troubling question that exists in scholarly literature, in theory, or in practice that points to the need for meaningful understanding and deliberate investigation.