In experimental design, diffusion refers to ______.
A) people leaving a study
B) people changing over time
C) a treatment effect spreading from group to group
D) a treatment having less and less effect

Question

Quizplus · Accepted Answer

Diffusion in experimental design refers to the effect of a treatment spreading from the treatment group to the control group (or vice versa) through communication or interaction between participants. This can confound the results of a study by making it difficult to attribute effects to the treatment itself rather than external factors.

In Experimental Design, Diffusion Refers to ______