Chapter 3: Psychological Science

True or False?

Remember – try to go beyond just answering True or False; use the questions as a way of reviewing what you know about the topic.


  1. Correlational research allows us to assess the causal impact of one variable on another.
  2. Lack of external validity limits the extent to which the findings of a study can be generalized.
  3. The standard deviation is a measure of dispersion.
  4. A parsimonious theory is one that can be shown to be incorrect.
  5. The median is a measure of dispersion.
  6. Case studies, surveys and naturalistic observation are all descriptive research designs.
  7. In an experiment, the researcher manipulates the independent variable.
  8. Multiple regression is used to analyse the results of a case study.
  9. In an experiment, a confounding variable would be a threat to internal validity.
  10. In an experiment looking at the effect of eating candy on irritability, irritability would be the independent variable.

Answers :

  1. false
  2. true
  3. true
  4. false
  5. false
  6. true
  7. true
  8. false
  9. true
  10. false


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