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Quantitative vs. Qualitative Methods in Science

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About This MicroSim

This interactive MicroSim helps students compare quantitative and qualitative methods by identifying their strengths, limitations, and appropriate applications in scientific inquiry.. It supports the learning objectives in Chapter: Natural Sciences and the Scientific Method.

How to Use

Use the interactive controls below the drawing area to explore the visualization. Hover over elements for additional information and click to see detailed descriptions.

Iframe Embed Code

You can add this MicroSim to any web page by adding this to your HTML:

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<iframe src="https://dmccreary.github.io/theory-of-knowledge/sims/quant-qual-methods/main.html"
        height="450px"
        width="100%"
        scrolling="no"></iframe>

Lesson Plan

Grade Level

9-12 (High School / IB TOK)

Duration

15-20 minutes

Prerequisites

  • Basic understanding of the Natural Sciences and Human Sciences as Areas of Knowledge
  • Familiarity with the idea that different research methods produce different types of evidence
  • Ability to distinguish between numerical data and descriptive data

Learning Objectives

  • Analyze the key differences between quantitative and qualitative research methods and how each shapes the knowledge produced

Activities

  1. Exploration (5 min): Open the sim and compare quantitative and qualitative methods across all six dimensions (data type, sample size, analysis approach, reliability, validity, and generalizability). For each dimension, note which method scores higher and why. Switch between at least two discipline contexts (e.g., Psychology and Ecology) to see how the comparison shifts.
  2. Guided Practice (10 min): In pairs, select a research question such as "How does social media affect teenage well-being?" For each method, use the sim to identify what kind of evidence it would produce, what it would reveal, and what it would miss. Create a two-column table summarizing your findings. Then discuss: Could combining both methods produce more complete knowledge?
  3. Assessment (5 min): Given a specific knowledge question — "Is access to clean water improving globally?" — write a brief justification for which method (or combination) would be most appropriate, referencing at least two dimensions from the sim to support your reasoning.

Assessment

  • Correctly identifies at least three dimensions on which quantitative and qualitative methods differ
  • Explains how the choice of method shapes the type of knowledge produced
  • Provides a reasoned argument for method selection tied to a specific knowledge question

Quiz

Test your understanding with this review question.

1. A researcher wants to understand why patients in a rural community distrust a new vaccine. Which methodological approach is most appropriate and why?

  1. Quantitative survey of 10,000 people, because larger sample sizes always produce better knowledge.
  2. Qualitative interviews with community members, because understanding reasons and lived experiences requires rich descriptive data.
  3. Quantitative analysis of vaccination rates, because numerical data is more objective than personal accounts.
  4. Neither method can address this question because distrust is not measurable.
Show Answer

The correct answer is B. The question asks "why" patients distrust the vaccine, which requires understanding motivations, beliefs, and cultural context — precisely the kind of knowledge qualitative methods are designed to produce. Option A would measure the extent of distrust but not explain it. Option C measures behavior, not reasoning. Option D incorrectly assumes the question is unanswerable.

Concept Tested: Matching research methods to knowledge questions

References

  1. International Baccalaureate Organization. Theory of Knowledge Guide. Cardiff: IBO, 2022.
  2. Woolman, M. Ways of Knowing: An Introduction to Theory of Knowledge. IBID Press, 2006.