Shaantanu Kulkarni

Shaantanu Kulkarni

Shaantanu is a sport psychology researcher-consultant with a PhD in Human Kinetics. You can learn more about his work on

primary vs secondary sources

Primary vs Secondary Sources in Research: Differences and Examples

Understanding the distinction between primary and secondary sources is fundamental to conducting rigorous research. A primary source is original material created at the time of the event or phenomenon being studied, such as a laboratory experiment, survey data, historical document, or interview. A secondary source is an interpretation, analysis, or summary of primary sources, such as a literature review, textbook chapter, or research article that discusses others' findings. The ability to distin

By Shaantanu Kulkarni —

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How to Write a Discussion Section: Interpretation, Limitations and Implications

The discussion section of a research paper is where you explain what your results mean, how they relate to existing evidence, what limitations affect their interpretation, and what implications they have for theory, practice, or future research. Unlike the results section, which reports the data, the discussion interprets the data. It is the section where you transition from presenting facts to making arguments, connecting your findings to the broader body of knowledge and explaining why they ma

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How to Write a Research Paper Introduction: Structure and Examples (CARS Model)

The introduction of a research paper establishes the context for the study, identifies the research gap, and presents the research question or objectives that the study will address. It is the first substantive section the reader encounters after the abstract, and its purpose is to convince the reader that the study is necessary, well-positioned within the existing literature, and clearly focused. A strong introduction takes the reader on a logical path from broad context to specific purpose in

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How to Write a Research Rationale: Definition, Examples & Justification

A research rationale is the section of a proposal, thesis, or manuscript that explains why the study is necessary and what contribution it will make to existing knowledge. It answers the question every reviewer and reader will ask: why does this study matter? The rationale connects the identified research gap to the purpose of the study, providing the logical justification for conducting the research rather than leaving the gap unaddressed. [1] The rationale is often the deciding factor in whet

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Publication Bias: Funnel Plots, Egger's Test + Prevention

Publication bias occurs when the results of a study influence whether it is published, creating a systematic distortion in the available evidence. Studies with statistically significant, positive, or novel findings are more likely to be published than studies with null, negative, or inconclusive results. When a systematic review or meta-analysis draws only from published literature, the pooled effect estimate may overestimate the true effect because the studies that found smaller or no effects a

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Effect Size Explained: Cohen's d, Hedges' g, OR + RR Guide

Effect size is a quantitative measure of the magnitude of a phenomenon, relationship, or difference observed in a study. While statistical significance tells you whether an effect exists (whether the null hypothesis can be rejected), effect size tells you how large that effect is and whether it matters in practice. A study may yield a statistically significant p-value even when the actual effect is negligible, or it may produce a non-significant p-value despite a meaningful effect, simply becaus

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Scoping Review vs Systematic Review: Differences With Examples (2026)

A scoping review and a systematic review are both forms of evidence synthesis that follow structured, transparent methodologies, but they serve fundamentally different purposes. A scoping review maps the breadth and nature of available evidence on a broad topic, while a systematic review synthesizes and appraises evidence to answer a specific, focused question. Choosing the wrong type wastes months of work and produces a review that does not match what journals, funders, or guideline panels expe

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How to Conduct a Scoping Review: Steps + Examples (2026)

A scoping review is a type of evidence synthesis that maps the breadth and nature of research activity on a broad topic, rather than answering a narrow clinical question like a systematic review does. Researchers use scoping reviews to identify knowledge gaps, clarify key concepts, examine how research is conducted on a topic, and determine whether a full systematic review is feasible or necessary. The approach is particularly valuable when a research area is complex, has not been comprehensivel

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PRISMA Guidelines: Step-by-Step Workflow With Examples

PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) is an evidence-based reporting guideline that helps researchers transparently document every phase of a systematic review. The PRISMA 2020 statement includes a 27-item checklist organized into seven sections and a four-phase flow diagram that tracks how records move from identification through screening to final inclusion. Following these guidelines ensures that readers, peer reviewers, and journal editors can evaluate e

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How to Write a Literature Review: A Step-by-Step Guide (Structure + Template)

A literature review is a critical survey and synthesis of existing scholarly sources on a specific topic. Rather than simply summarizing individual studies, it evaluates, compares, and connects findings to identify patterns, debates, and gaps in the current knowledge. A literature review appears in theses, dissertations, journal articles, and research proposals as the foundation that justifies why new research is needed. [1] For many researchers, the literature review is the most challenging se

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What Is a Theoretical Framework: Step-by-Step Guide with Examples

A theoretical framework is the foundation of a research study that uses established theories to explain, predict, and contextualize the research problem. It connects your study to existing scholarly knowledge by identifying the key concepts, defining relationships between variables, and providing the lens through which you interpret your findings. Think of it as the intellectual scaffolding that holds your entire study together, from your research questions through your methodology to your concl

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conceptual framework

What Is a Conceptual Framework: Step-by-Step Guide with Examples

A conceptual framework is a visual or written representation of the key concepts, variables, and relationships that guide a research study. It maps how the researcher understands the problem, which factors are relevant, and how those factors connect to each other and to the research question. Every empirical study needs one, yet it is one of the most misunderstood and poorly executed components of a research proposal. A 2025 study in BMC Medical Research Methodology on the role of conceptual fr

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