Literature review is most important to identify the problem of the study, which can be solved by collection of data. It is very important to know that the work is doing by researcher in a research should not be repeated again. Literature review observes about the work that it is doing, is repeating unintentionally. It also helps to avoid the mistakes, which already done by another one. So researcher can improve the research design and instrumentation, which was not successful at the last time (Cottrell & McKenzie 2011). A new research is depends on the past knowledge, and not includes a part of knowledge. A well created literature review establishes creditability of the researcher of the study, so he can get the entire benefit of his work (Leary 2004).
Literature review discloses appropriate theoretical structure of the study that helps to understand easily. It verifies that it has not been already done. It is the best way to establish the importance of the study (Houser 2007). Literature review is important to judge research question and to provide latest research material for the readers. Literature review makes it sensible because it uses both the side. In the literature review, researcher uses supportive argument as well as opposite (Writing Literature Reviews 2007).
After designing the plan, researcher goes to search for literature. In this step he has to find out materials, which is relevant to the subject matter. To find the matter books, articles, print or electronic media, newspapers, web sources etc. can use. These sources are use to collect the information (How to... write a literature review 2011). Once a matter has been searched than exclusion and inclusion criteria are decided. In this stage all the matter is evaluate to delete unnecessary matter. The last stage of literature review is synthesis, which means discussing the findings and conclusions of relevant literature. It is a summarizing part of literature review (The Stages of a Literature review 2010).
From the above discussion, it can be concluded that literature review is the most important part of the research to complete it. It is a central topic and body text of the research. It is synthesis concept of the study. It is an overall review of what a researcher found in the research program.
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