Practice Quiz

EPPP Psychology

Category - Research Methods and Statistics

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Research aims to draw conclusions about relationships among variables. There are a number of threats to validity-factors that interfere with making reliable and clear conclusions. Which of the following is a threat to construct validity?
  1. The Hawthorne effect
  2. The John Henry effect
  3. Diffusion
  4. Experimental mortality
Explanation
Answer: B - The John Henry effect refers to individuals in a control group trying harder than usual due to competitive drive. Threats to construct validity are factors other than the specifics of an intervention that may result in differences; the John Henry effect can be controlled by not allowing control groups and experimental groups to know about each other, when possible.
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