How to Conduct a Literature Review with Examples

Literature Review

Master the Art of Literature Review

A literature review is the foundation of any research project. Learn how to systematically search, critically evaluate, and synthesise academic sources to identify research gaps and position your contribution.

Systematically search and retrieve relevant academic sources
Critically evaluate and synthesise existing research
Identify and articulate genuine gaps in the literature
Literature Review At a Glance
50+ Sources Minimum
5-7 yr Recency Standard
3–4 Core Databases
10K+ Students Helped
Review Phases

Six Phases of a Systematic Literature Review

A structured approach from search strategy to final synthesis

Define Scope & Objectives

Formulate research questions, establish inclusion/exclusion criteria, and determine review boundaries before searching.

Search Academic Databases

Execute Boolean search strings across Scopus, Web of Science, PubMed, and discipline-specific databases.

Screen & Select Sources

Apply inclusion/exclusion criteria to titles/abstracts, then full texts, using PRISMA or similar frameworks.

Extract & Assess Quality

Use standardised data extraction forms and quality assessment tools (e.g., CASP, JBI, MMAT).

Synthesise the Evidence

Group sources thematically, chronologically, or methodologically. Compare findings and identify patterns.

Write & Report Findings

Structure your review with clear headings, critical analysis, and explicit gap identification for your study.

Search Strategy

Key Academic Databases to Search

Access the most relevant sources using these essential academic databases

Google Scholar
PubMed (Biomedical)
Scopus (Elsevier)
Web of Science (Clarivate)
PsycINFO (Psychology)
JSTOR (Humanities)
EBSCOhost
IEEE Xplore (Engineering)
SSRN (Social Sciences)
ERIC (Education)
Boolean Keyword Strategy

Combine keywords with Boolean operators to maximise search precision and recall

Primary Keywords (Example Topic: AI in Healthcare) "machine learning" "deep learning" "neural networks" "artificial intelligence"
Boolean Operators Explained AND Narrows search (all terms must appear) OR Broadens search (either term appears) NOT Excludes unwanted terms "exact phrase" Finds exact word sequences
Applied Search Example
("machine learning" OR "deep learning") AND ("diagnosis" OR "medical imaging") NOT "review"
Review Types

Types of Literature Reviews

Choose the appropriate review methodology based on your research question and objectives

Systematic Review

Rigorous, replicable methodology to answer a specific research question using predefined protocols (PRISMA).

Evidence-based Rigorous
Narrative Review

Broad overview of a topic; synthesises literature thematically without strict systematic protocols.

Broad Exploratory
Meta-Analysis

Statistically combines quantitative results from multiple studies to derive overall effect sizes.

Statistical Quantitative
Scoping Review

Maps the breadth of literature on a topic to identify key concepts, sources, and evidence gaps.

Mapping Overview
Practical Examples

Literature Review Writing Examples

Learn from annotated examples of strong synthesis and gap identification

Strong Synthesis Example
"While early studies focused primarily on clinical efficacy (Chen et al., 2019; Patel, 2020), more recent research has shifted attention to implementation barriers in real-world settings (Williams, 2022; Rodriguez & Lee, 2023). This evolution reveals a growing recognition that technical effectiveness alone does not guarantee successful adoption."
This example connects multiple sources to a single analytical point, showing chronological evolution of a research field.
Gap Identification Example
"Despite substantial research on the efficacy of online learning in higher education (Smith, 2020; Johnson et al., 2021; Lee, 2022), few studies have examined its impact on first-generation college students. Specifically, no research has investigated how digital access disparities affect completion rates for this population in online STEM courses."
This example clearly articulates a research gap by contrasting what exists with what is missing, focusing on a specific population.
Critical Evaluation Example
"While Thompson (2021) reports positive outcomes using survey data, the cross-sectional design limits causal inference. In contrast, Martinez's (2022) longitudinal study provides stronger evidence but focuses exclusively on a single institutional context, raising questions about generalisability."
Demonstrates critical evaluation by comparing methodological strengths and weaknesses across studies.
Thematic Organisation Example
"Three dominant perspectives emerge from the literature: (1) behavioural approaches emphasising individual cognition, (2) socio-cultural frameworks foregrounding community practice, and (3) institutional analyses examining structural barriers. While each offers valuable insights, the lack of integration between these perspectives represents a significant theoretical limitation."
Organises literature thematically, synthesises across schools of thought, and identifies a theoretical gap.