"A literature review is the comprehensive study and interpretation of literature that addresses a specific topic. If your literature review is a preliminary review prior to a larger study, the purpose of the review is to provide a critical account of the literature in a particular area in order to demonstrate why a new research study is required. The aim of the researcher is to review and critique the literature relating to the topic of enquiry, in order to demonstrate their understanding of both the research and the methods previously used to investigate the area. If you are undertaking a literature review for this purpose, you must systematically search, critique and combine the literature to demonstrate a gap in the existing research base and justify your proposed research question. If your whole research project is a literature review, you will seek to answer a specific question in your review" (Aveyard, H., 2010, p. 2).