Try Wonders for freeWhat a nursing literature review actually involves
Nursing is one of the few undergraduate subjects where the literature review is explicitly a method, not a preamble. A typical assignment asks you to do four separate things, and they are marked separately:
- Build a searchable question, usually as PICO — population, intervention, comparison, outcome.
- Search a controlled vocabulary, not just free text. CINAHL has its own subject headings; MEDLINE and PubMed have MeSH.
- Apply inclusion and exclusion criteria and say how many records each step removed.
- Grade what you found against a levels-of-evidence table, then appraise the individual studies.
Only the first half of that list is a search problem. The second half is judgement, and it is the part your marker is actually reading.
The specific problems
Two vocabularies, neither of them yours. MeSH is, in the National Library of Medicine's own words, "a controlled and hierarchically-organized vocabulary produced by the National Library of Medicine", used "for indexing, cataloging, and searching of biomedical and health-related information" and covering the headings in MEDLINE/PubMed. CINAHL, published by EBSCO, has its own subject headings which EBSCO says "follow the structure of the Medical Subject headings (MeSH) used by the National Library of Medicine". They are similar. They are not the same, and a search string that worked in one will quietly under-retrieve in the other.
CINAHL is not a general index. EBSCO describes CINAHL Complete as offering access to "708 active full-text journals and magazines", of which "591 active full-text, peer-reviewed journals" — deep in nursing and allied health, and deliberately narrow. That is a strength for a nursing search and a weakness the moment your topic touches psychology, education or health policy.
Evidence hierarchies are unforgiving. A randomised controlled trial and an expert opinion piece are not interchangeable, and the appraisal tools reflect that: JBI publishes "downloadable checklists designed to help assess the trustworthiness, relevance and results of published research", with a separate tool for each design — randomised controlled trials, cohort studies, case-control studies, qualitative research, prevalence studies, textual evidence and more. Whichever table your school uses, you will be asked to place each source on it and defend the placement.
Grey literature counts here more than almost anywhere. NICE guidance, WHO documents, trust policies and specialty-college standards are often the most current thing on a clinical question, and none of them behave like a journal article when you cite them.
What Wonders does for those problems
Concretely, and only what it does today:
- Turns a PICO question into a Boolean query you can see and edit. The query builder shows the string it is running, so you can paste the same logic into CINAHL or PubMed and adapt the terms to their headings. Our guide to Boolean search strings for databases covers the syntax differences.
- Searches breadth, not depth. Wonders has no index of its own: it searches OpenAlex and Semantic Scholar — over 320 million scholarly works — plus Google Patents as a separate corpus. That is wider than CINAHL and shallower in nursing. Use it to find what CINAHL's scope leaves out, then go back to CINAHL.
- Checks quotes before it shows them. When a summary quotes a paper, Wonders looks for those words in the paper's text first; if it cannot find them, it does not present them as a quote. Where full text is available, a citation carries the page number and clicking it opens the PDF at that passage.
- Puts journal quality on the result. Search ranking takes SCImago quartiles into account for more than 28,000 journals, and you can filter by quartile. This tells you about the journal. It tells you nothing about whether a particular study was well conducted.
- Routes full text through your library. OpenURL, EZproxy, OpenAthens, KBART holdings and LibKey are supported, so the link goes through your university's subscription where your institution has set that up.
- Writes with the citations attached. The notebook takes inline citations and builds the bibliography automatically in APA, MLA, Chicago, Harvard, IEEE or Vancouver, and exports to DOCX, PDF, LaTeX or HTML, and to BibTeX, RIS or CSV. You can save papers to Zotero, and import
.ris,.bibor.nbibfiles in. - Keeps one project in three tabs — Search, Organize, Write — so the sources you kept, the notes on them and the draft are in the same place.
Citation provenance and a supervisor audit view, real-time co-editing, and chat across a whole project are in beta and not generally available. Chatting with a single paper works today, after you log in.
What Wonders does not do, and what to use instead
This is the honest half of the page.
| The job | Does Wonders do it? | What to use |
|---|---|---|
| Search CINAHL or MEDLINE with subject headings | No | CINAHL through EBSCO; PubMed or Ovid MEDLINE for MeSH |
| Title/abstract screening, dual review, conflict resolution | No | A dedicated screening tool — ask your subject librarian which one your university licenses |
| PRISMA flow diagram | No | Our PRISMA 2020 guide explains the counts; the diagram itself you build elsewhere |
| Data-extraction tables across many studies | No | A spreadsheet, or a review tool that extracts |
| Critical appraisal | No | The JBI checklists, or whichever appraisal tool your module specifies |
| Write the essay or paraphrase a source | No, deliberately | Nothing. Write it |
| AMA-formatted bibliography | No | A reference manager, or our AMA guide by hand |
Use something else if your assignment is a systematic or scoping review with a screening stage. That is not a small gap you can work around; it is the core of the method. Our guide on systematic, scoping and narrative reviews will tell you which one you have been set, and inclusion and exclusion criteria covers the step Wonders cannot run for you.
Wonders is a reasonable fit if you are writing a narrative or integrative review, an evidence-based practice assignment or a dissertation chapter, and the hard parts are finding enough good sources, keeping track of them and getting the references right.
What it costs
Plus is $20 a month, or $144 a year — $12 a month. Verified students pay $10 a month, or $72 a year — $6 a month, for up to four years. There is a 14-day free trial and no free plan, so searching needs the trial or a subscription. Current prices are always on pricing.