The systematic identification of evidence is an essential step in developing NICE guidelines. Literature searches should be systematic, transparent and reproducible to minimise 'dissemination biases'. These may affect the results of reviews and include publication bias and database bias. This chapter provides advice on the sources to search and on how to develop strategies for systematic literature searches to identify the best available evidence. It also provides advice on other areas of information management that form an important part of guideline development.
How to do an effective literature search in 5 steps - Kolabtree Blog
Databases structure research citations into fields to describe the citation , for example, Title, Abstract, Journal, Year, Author Keywords, Database Keywords or Descriptors. Database searching involves using terms and phrases to search the fields in order to find citations that are likely to be relevant to a research question. Generally, in Boolean database searching, the user specifies the exact combination of terms to search the database. This is different to an Internet search engine which interprets what it is thinks the user is looking for.
Finding sources scholarly articles, research books, dissertations for your literature review is part of the research process, a process that is iterative--you go back and forth along the process as new information is gather and analyze until all necessary data is acquire and you are ready to write. The main steps in this research process are:. Planning : Before searching for articles or books, brainstorm to develop keywords that better describe your research question.
This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals , institutional repositories , archives, or other collections of scientific and other articles. Databases and search engines differ substantially in terms of coverage and retrieval qualities. Furthermore, some programs are only partly free for example, accessing abstracts or a small number of items , whereas complete access is prohibited login or institutional subscription required. The "Size" column denotes the number of documents articles, publications, datasets, preprints rather than the number of citations or references. The database itself should be the primary source of statistics, and if it is not accessible, the independent estimates released as journal papers should be.