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?
A)The Hawthorne effect
B)The John Henry effect
C)Diffusion
D)Experimental mortality

Question

Quizplus · Accepted Answer

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.

Research Aims to Draw Conclusions About Relationships Among Variables