So you’ve done your research, you’ve developed your thesis, you have a good idea of what you want to do for your research essay. You have all this helpful research, but you’re at a loss of how to incorporate it it, and prove you’re not just spouting random things, that you’re ideas are grounded in the work of the experts.
This is why we have Literature Reviews. The granddaddy of the Annotated Bibliography, this is a form of writing that fulfills many of the same purposes of the Annotated Bibliography, but while putting them into the essay itself. This isn’t literature as in fiction; rather, this refers to the influential works and writings of the scholars and experts in a field. Basically, you’re taking what the experts have said and bringing it all together.
Both genres, the Annotated Bibliography and the Literature Review, are ways for researchers to present their research. However, Annotated Bibliographies are preliminary pieces, done before the main ideas and concepts are formed, generally so the author can catalogue and make sure they have a basic understanding of their topic and what the experts say about it. Annotated Bibliographies are rarely published and remain a resource for the researcher as they work on a larger piece. The Annotated Bibliography is work researchers do for themselves, which is why it is a popular assignment in writing classes: go through the process of understanding and evaluating your research early on.
Literature Reviews are different. First and foremost, they get published, though not usually independently; they are significant parts of larger pieces of research and fulfill specific purposes. Find a major scientific study and the first couple of pages will likely focus on work other people have done, identifying current theories and concepts. They won’t be comprehensive, i.e., bringing every piece of research ever that’s related to the topic, but it will focus on more recent and more significant ones.
The Literature Review, though, is not where authors provide and discuss their own ideas and conclusions. The Literature Review opens a piece as a kind of information genealogy. In a way, you are taking your Annotated Bibliography and sorting the information by theme or concept (generally using a graduated or comparative method of organization), and showing how different scholars and researchers have addressed similar issues that contribute to your own work. It is a matter of showing how you can take other’s ideas and concepts and synthesize them. Therefore, Literature Reviews generally do three closely related things.
First, it’s how researchers can demonstrate their expertise. Major research pieces can have bibliographies that go on for pages, but some of these sources can be mentioned a handful of times in a research piece. This isn’t necessarily a bad thing. It’s the researcher’s opportunity to show the work they’ve done, and the extent of their knowledge and familiarity with the information.
Second, it is where the researcher traces how they developed their ideas, and that their work fits with the rest of the literature. They can take different ideas and synthesize them, bring them together to generate new knowledge and information, tracing the history of their topic, within their own research, and contextualize their work within the greater picture.
Third, it shows how your research fits in the bigger picture. You don't want to just know a lot of stuff, but show you can fit your work in with the work of others. Writing and research don’t take place in a vacuum, and if you try to, or even if you only do some research, you’ll likely just make claims others have made, and done a better job making, before. It’s a good way to showcase your ignorance, and you don’t want to do that.
There’s a lot riding on a Literature Review. It’s an exercise in establishing your credibility and showing the people who know about your topic you’re worth taking seriously. A bad Literature Review can break your piece faster than a bad idea. You could have a great idea, but if you can’t show where it fits with the rest of the research being done, nor can you demonstrate your own familiarity with the discipline, it’s going to be really hard for those who do know to take you seriously.