Types of data, methods and research design

Paper 1 – Methods of research

Types of Data

Primary data 📚 – data collected directly from the source. Analogy: It’s like cooking a new dish from scratch.

  • Surveys, interviews, observations, experiments.
  • Example: A questionnaire on teenagers’ use of social media.

Secondary data 📖 – data already collected by someone else. Analogy: It’s like following a recipe you found online.

  • Government statistics, academic journals, media reports.
  • Example: National crime statistics from the police.

Research Methods

Qualitative methods

Focus on depth, meaning, and context. Analogy: Like a detective piecing together a story.

  • Interviews (structured, semi‑structured, unstructured)
  • Focus groups
  • Ethnography, case studies

Quantitative methods

Focus on numbers, measurement, and generalisation. Analogy: Like a scientist running a lab experiment.

  • Surveys with closed questions
  • Experiments, quasi‑experiments
  • Statistical analysis (mean, median, standard deviation)

Mixed methods

Combines both to get a fuller picture. Analogy: Like using both a microscope and a telescope.

  • Sequential explanatory design (quant → qual)
  • Concurrent triangulation (qual & quant together)

Research Design

Structure of a study that determines how data are collected and analysed.

Design Key Features Example
Experimental Random assignment, control & experimental groups, manipulation of independent variable. Testing the effect of a new teaching method on exam scores.
Quasi‑experimental No random assignment, uses existing groups. Comparing two schools that already use different curricula.
Non‑experimental Observational or survey data, no manipulation. Cross‑sectional survey of attitudes toward climate change.

Exam Tips

  • Define key terms – e.g., primary vs. secondary data, qualitative vs. quantitative.
  • Use examples to illustrate each method or design.
  • Show comparisons (e.g., experimental vs. non‑experimental) in a table or bullet list.
  • Remember the strengths & weaknesses of each approach.
  • Practice short, clear answers – aim for 2–3 sentences per point.

Revision

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