NRS 493 Topic 1 DQ 1: Choosing Databases

Name two databases and say what each actually contains, because a post that names them and stops has answered a third of the question. CINAHL indexes nursing and allied health literature specifically, including journals that are not indexed elsewhere, and it applies its own subject headings. MEDLINE, usually reached through PubMed, indexes biomedical literature with MeSH headings and covers the clinical evidence base more broadly. The Cochrane Library holds systematic reviews and is worth naming if your proposal rests on synthesised evidence. Justify your two by the proposal you are actually writing rather than by reputation: a nursing workflow change is better served by CINAHL, while a change involving a drug or a device needs the biomedical index. Say what you would search for in each, in the words you would actually type, since a database named without a search plan is a preference rather than a method. One worked search is worth more than three database names.

The comparison is the graded half, and the argument that works is about mechanism rather than quality. Controlled vocabulary is the main one. A subject database assigns each record a heading from a fixed thesaurus, so searching that heading retrieves every relevant article whatever words its authors used — pressure ulcer, pressure injury and decubitus ulcer all resolve to one concept. A general search matches strings, so you find the articles that happened to use your phrasing. Then the filters, which do work no keyword can: publication type, peer-reviewed status, date, age group, and evidence level. Then scope, since Google Scholar's coverage is undisclosed and includes predatory journals, theses and preprints without distinguishing them, and access, since library subscriptions give full text rather than an abstract and a paywall. Be fair to Google Scholar as well: it is good for locating a known item and for citation chaining, and saying so makes the rest of your argument more credible than dismissing it.