1. Conducting a Literature Review
A rigorous literature review is the backbone of every research project. It defines what is known, identifies gaps, and justifies your study — yet it is frequently done poorly.
Getting Started
- Define first, search second: Define your topic clearly and precisely before searching. A broad question leads to an unmanageable volume of literature; a narrow question may miss important context.
- Frame your four questions: Ask four key questions: What do I already know? What gaps exist? What is controversial? What still needs studying? These guide your search strategy and eventual write-up.
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Search multiple databases: Use multiple databases (PubMed, CINAHL, Cochrane, Web of Science, Google Scholar) and do not rely on a single source.How to search PubMed: A Ready Reckoner for ...
- Document your search strategy: Record your search strategy (databases used, keywords, date range, filters applied) so it can be reported and reproduced.
Selecting & Organising Literature
- Apply consistent criteria: Apply inclusion and exclusion criteria consistently. Document why papers were included or excluded.
- Use reference management software: Use reference management software (Endnote, Zotero, RefWorks) from day one to organise, store, and cite your references. ReadMendeley Reference Manager: A Step-by-step Guide,Zotero: A Quick Start Guide
- Always read the full paper: Read full papers, not just abstracts. Findings and conclusions reported in abstracts are frequently oversimplified or even misleading.
- Trace claims to primary sources: Do not cite a conclusion from a Cochrane review or meta-analysis without checking whether the primary studies are relevant to your population and context.
Writing the Review
- Synthesise, do not summarise: A literature review is not a list of summaries. It is a critical synthesis that builds an argument, organise by theme, not by author or publication date.
- Map the landscape: Clearly identify what is known, what is debated, and what is unknown. This structure naturally leads to your research question.
- Present conflicting evidence fairly: Acknowledge conflicting evidence. Presenting only papers that support your position undermines the credibility of your review.
- Write clearly and precisely: Keep jargon to a minimum and use accurate terminology throughout. Referencing should be accurate and consistent.
- Stay anchored to your question: A focused research question is essential before you can evaluate whether your review is complete. Keep returning to your question as a compass.
2. Critically Appraising Research
Not all published research is of equal quality. Critical appraisal is the systematic evaluation of a study's strengths and limitations to determine its credibility and applicability.
Core Principles
- Evaluate fairly: Critiquing is not the same as criticising. A critique objectively evaluates both strengths and weaknesses — it is the creation, not the creator, that is being evaluated.
- Stay objective: Maintain objectivity throughout. Avoid personal opinions; support all evaluative statements with reference to research texts or other published evidence.
- Acknowledge probability: Research works within the realm of probability. Always refer to "apparent strengths and limitations" rather than absolute conclusions.
What to Appraise: Four Domains of Thesis Writing
- Clarity: Are the aims, methods, and questions clearly stated and appropriate?
- Validity: Is the study design appropriate for the question? Is it free from major sources of bias? Was it conducted ethically?
- Reliability: Could this study be repeated and yield similar results? Is the data collection and statistical analysis sound?
- Applicability: Are the findings relevant, helpful, and applicable to your context? Do the benefits outweigh the potential harms?
Common Appraisal Questions
- Is a worthwhile problem or question clearly identified?
- Is the chosen methodology appropriate and justified for the research question?
- Are eligibility criteria and sampling methods clearly described?
- Are the statistical tests appropriate for the data type and study design?
- Are limitations acknowledged, and are conclusions proportionate to the data?
- Does this study add something new to existing knowledge, or has it been done before — and better — elsewhere?
3. Citations & Reference Integrity
Citations are the building bricks of science communication. Inaccurate or unethical citations undermine the integrity of your work and the scientific record. First, learn using a reference manager
Citing Correctly
- Go to the source: Always cite primary sources. Do not cite a secondary source's account of a primary study without verifying the original.
- Read before you cite: Read, understand, and accurately represent the main points of every paper you cite. Citing a paper you have not read is unethical.
- Cite purposefully: Cite only references that are directly relevant to your argument. Excessive or irrelevant citations dilute the quality of your reference list.
- Use current references: Keep references current. Reviewers check the timelines of references to judge the novelty and currency of your manuscript.
- Validate every reference: Verify every reference for accuracy — author names, journal title, volume, page numbers, and DOI. A single incorrect reference reduces credibility.
Avoiding Citation Malpractice
- Avoid citation stuffing: Do not engage in "citation stuffing" — adding references merely to inflate numbers or appease likely reviewers.
- Do not cherry-pick citations: Do not cite papers that contradict your argument without acknowledging the contradiction. Selective citation is a form of bias.
4. Avoiding Plagiarism
Plagiarism is the use of another's ideas, words, or intellectual property without attribution — whether intentional or not. It is considered serious scientific misconduct with potentially career-ending consequences.
Understanding the Forms
- Verbatim / copy-paste: Verbatim plagiarism: Copying text word-for-word without quotation marks and attribution — the most obvious form.
- Mosaic plagiarism: Mosaic plagiarism: Paraphrasing closely by rearranging or substituting a few words from a source without attribution — harder to detect but equally unethical.
- Idea plagiarism: Idea plagiarism: Presenting another person's concept, theory, or original idea as your own, even if entirely reworded.
Practical Prevention Strategies
- Write from memory, then verify: After reading a source, close it and write your understanding in your own words from memory. Then check your version against the source.
- Quote marks for direct text: When you do use exact words from a source, enclose them in quotation marks and provide a citation — even a single distinctive phrase requires this.
- Use detection software proactively: Run your manuscript through plagiarism detection software (e.g., iThenticate, Turnitin) before submission. Most journals do this anyway — better you find it first.
- Keep meticulous notes: Keep detailed notes during your literature review, including the source for every idea or phrase you record.
- When in doubt, cite: When in doubt, cite. It is always safer to over-cite than to be accused of plagiarism.
5. Writing Research Thesis
Writing up is where many students stall — planning and structure are the antidotes.
Understanding What a Thesis Must Do
- Document the journey: Report each stage of the research process clearly and transparently.
- Establish the context: Provide a comprehensive description of what is known in and around your field of inquiry.
- Justify every decision: Describe in detail each methodological decision and justify why it was the best approach for your question.
- Acknowledge problems: Discuss honestly any problems, limitations, or unexpected findings that arose.
- Point to the future: Outline where and how future research can build on your work.
Practical Writing Tips
- Start early and write continuously: Start writing early — even rough notes and outlines count. The thesis is written in stages, not in one sitting.
- Write sections iteratively: Write in sections. Do not wait until all data collection is complete before writing the introduction or methods chapter.
- Use your supervisors actively: Seek expert guidance and supervision throughout. Do not isolate yourself — get feedback at every stage.
- Maintain a logical thread: Present a logical argument (the "main thesis") that runs like a thread through every chapter. The examiner should be able to follow this argument without losing the thread.
- Write to the examiner's questions: Know what examiners look for and write to those expectations: a worthwhile question, appropriate methodology, critical use of literature, and honest findings.
Final Tips for the Postgraduates
Starting out in research is daunting. These lessons from researchers who have navigated the journey from clinician to published investigator can save you time, frustration, and false starts.
- Secure time and support first: Secure institutional support and protected time for research before you begin. Research conducted entirely in your own time is unsustainable and often lower quality.
- Research your passion: Choose a topic that genuinely interests you and arises from your clinical observations. Curiosity sustains you through the long process; obligation does not.
- Refresh your methodology skills: Revisit research methodology before starting, even if you have previous experience. Methods evolve, and building on an outdated approach undermines credibility.
- Seek complementary supervision: Assign yourself two supervisors or mentors with complementary expertise — one with domain knowledge, one with methodological strength.
- Start small, start well: Accept that your first piece of research may be small in scale. A well-designed small study is more valuable than an ambitious but flawed large one.
- Build your support network early: Build relationships with statisticians, librarians, and methodologists early. They are essential collaborators, not service providers you call at the last minute.
- Write every day: Write something every day, even if it is rough. Writing clarifies thinking. You cannot edit a blank page.
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