You do not need to read everything that has ever been written on your topic, because that may very well be physically impossible, but you must make sure you are familiar with all the key sources in your field that are pertinent to your problem or question.
During these sessions, students can get answers to introduction to the problem, background of study, statement of the problem, purpose of the study, and theoretical framework.
You may get useful hints about research design and methodology from the work others have done, to help you when you approach your own research design and methodology.
Doing the literature review will expose you to multiple viewpoints and perspectives on your topic and research problem or question. You may discover that experimental results which are relevant to your question or problem have until now been ambiguous, contradictory, or incomplete.
Literature reviews are pervasive throughout various academic disciplines, and thus you can adopt various approaches to effectively organize and write your literature review.
The University of Southern California created a summarized list of the various types of literature reviews, reprinted here: This form examines literature selectively in order to support or refute an argument, deeply imbedded assumption, or philosophical problem already established in the literature.While you are writing your dissertation, you are engaged in making a genuine contribution to the field of knowledge.In your dissertation, you will need to demonstrate how your research fits into all that has been done before, and all that is being done right now, on your topic, addressing your problem or question.Perhaps you will be refuting an existing theory or substantiating and extending an existing theory.The literature review allows you to provide a rationale for what you propose to do.You may even have access to research that is so recent it has not been published yet.In all these ways, doing a literature review is not only crucial to writing a dissertation, it is also giving you experience with the ongoing process of new knowledge and discovery that is taking place in your field.You may have to weigh competing theoretical arguments; you may also have to synthesize and evaluate varied strands of research conducted on different populations, different samples, and using different measures and research methods.Research that is published while you are writing your dissertation may add to what is known about your topic or provide additional evidence for or against one or another theory.This is called dissertation literature review because the research you are looking for has been published; it is “literature,” sometimes abbreviated “lit.” When you review this literature, you are looking up every relevant scholarly article, book, dissertation, or other resource that has ever been published on your topic and problem or question.You are not “reviewing” it in the literal sense, but you are familiarizing yourself with it and carefully recording the publication information about these sources so you can include them in your references and bibliography.