Other questions in this quiz

2. Which of the following represents the best definition of external validity?

  • The ability to ascribe the outcome to the influence of a particular factor
  • The ability to generalise our results to a wider population
  • When there is no systematic difference between sample results and the true state of affairs
  • Verification that instruments used are measuring what they purport to measure

3. Five years ago, there was a regional outbreak of illness caused by an unusual strain of Listeria.

As part of the investigation into the outbreak, the government checked the food history of 20 patients infected with the outbreak strain and compared them t

  • Experimental
  • Observational, case-control
  • Case study
  • Observational, cohort

4. How does randomisation and random sampling differ?

  • Random sampling is only used in true experiments while randomisation is only used in quasi-experiments
  • They are the same thing
  • The purpose of random sampling is to increase generalisability and the purpose of randomisation is to reduce the risk of selection bias
  • Both make use of a random selection procedure, such as flipping a coin

5. A researcher collects data on the same group of children at age five, 10, and 15 years.

This is an example of which research design?

  • Cross-sectional
  • Longitudinal
  • Qualitative
  • True experiment

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