What is the purpose of using Boolean operators in literature searches?

The purpose of using Boolean operators in literature searches is to enhance the relevance of search results. Boolean operators (such as AND, OR, and NOT) help refine the search by allowing the researcher to construct complex search queries that can either narrow or broaden the scope of results based on specific needs.

For example, using AND between two terms will return only results that contain both terms, which increases the specificity of the search. Conversely, OR can be used to include results that contain either term, allowing for a broader range of results. Utilizing NOT helps eliminate certain terms from the search, further focusing the results. This tailored approach is essential in evidence-based practice, where obtaining the most relevant and specific literature is critical for informed decision-making.

The other options do not accurately describe the primary function of Boolean operators. While they can indirectly assist in managing irrelevant articles by refining searches, their main purpose is not to delete those articles outright. Creating new hypotheses or restricting access to databases are not relevant roles of Boolean operators in the context of literature searching.