A scoping review is not the same as a systematic review, although the two are closely related members of the same family of structured, transparent evidence syntheses. A scoping review uses a systematic and reproducible search process, but it has a different purpose: it maps the breadth of literature on a topic, whereas a systematic review answers a narrow, specific question by appraising and often statistically combining studies. So while a scoping review is systematic in its method, it is a distinct review type rather than a form of systematic review.
The confusion is understandable, because both follow a rigorous protocol, both document their searches, and both aim to reduce bias. The key difference lies in the question being asked and in what happens to the studies once they are found.
Different questions, different goals
A systematic review typically starts with a tightly focused question, often framed using a structure such as PICO (Population, Intervention, Comparison, Outcome). It seeks the best available evidence to answer that question, for example whether a particular therapy improves a defined outcome. The emphasis is on depth, critical appraisal and, where appropriate, a meta-analysis that pools numerical results.
A scoping review starts with a broader question, such as what kinds of evidence exist on a topic, how research in an area has been conducted, or where the gaps lie. Rather than answering whether something works, it asks what is out there. This makes scoping reviews well suited to emerging fields, wide-ranging topics, or the preliminary stage before a full systematic review is even feasible.
Key differences at a glance
- Purpose: a systematic review answers a specific question, while a scoping review maps the extent, range and nature of the literature.
- Question breadth: systematic reviews are narrow and precise, scoping reviews are broad and exploratory.
- Critical appraisal: systematic reviews formally assess the quality and risk of bias of included studies, whereas scoping reviews usually do not, since they aim to include everything relevant regardless of quality.
- Synthesis: systematic reviews may combine results statistically through meta-analysis, while scoping reviews present a descriptive or thematic map, often with charts or tables.
- Output: a systematic review produces an answer or recommendation, a scoping review produces an overview and identifies gaps.
What the two share
Despite these differences, scoping and systematic reviews have important features in common, which is why a scoping review is not the same as a narrative or ordinary literature review either. Both require a predefined protocol, ideally registered or documented in advance. Both use a comprehensive, reproducible search across multiple databases. Both apply explicit inclusion and exclusion criteria, use transparent screening, usually with two reviewers, and report their process using a PRISMA style flow diagram. There is even a dedicated reporting extension, PRISMA-ScR, designed specifically for scoping reviews.
In other words, a scoping review borrows the discipline and transparency of the systematic method but applies it to a wider, more exploratory aim. It is systematic in conduct without being a systematic review in the technical sense.
When to choose each
Choosing between them depends on your objective. A systematic review is the right choice when you have a clear, answerable question, when the field is mature enough to have comparable studies, and when you need to inform a decision or recommendation. A scoping review is more suitable when the topic is broad or new, when you want to clarify key concepts and definitions, when you are surveying the types of evidence available, or when you are identifying gaps to justify future research.
Many researchers conduct a scoping review first and then a targeted systematic review afterward, using the map produced by the scoping stage to frame a precise question. This staged approach is common and entirely legitimate.
Guidance for Australian students and researchers
For students at Australian universities, the practical advice is to align the review type with your research aim and to confirm expectations with your supervisor, since the methodology guidance from bodies such as the JBI (formerly the Joanna Briggs Institute), which is based in Australia, is widely used for both review types and provides detailed manuals. Australian university libraries also publish clear guides distinguishing the two and offer librarian support for building your search. Getting this classification right early matters, because examiners will judge whether your method genuinely matches the type of review you claim to be conducting.
If you are planning either type of review, our literature review writing help service can help you select the right approach and structure the search and synthesis, and where the review forms part of a larger project our dissertation writing help shows how it connects to your wider methodology and aims.
In summary, a scoping review is a rigorous, systematic method, but it is not a systematic review. The systematic review answers a focused question through appraisal and synthesis, while the scoping review maps a broad body of literature to reveal its scope, characteristics and gaps. Understanding this distinction lets you pick the approach that genuinely fits your question, and describe it accurately in your methodology so that your work stands up to scrutiny.