Which source of evidence to support experimental results is most threatened by the use of a field experiment?
A) Agreement between the IV and DV
B) Time order of the occurrence of the variables
C) Control of contamination from extraneous variables
D) Use of a control group
E) Manipulation of the IV

Question

Quizplus · Accepted Answer

Field experiments, by their nature, occur in real-world settings where controlling for extraneous variables is more challenging compared to laboratory experiments. This makes it harder to ensure that observed effects are due to the manipulation of the independent variable rather than other, uncontrollable factors.

Which Source of Evidence to Support Experimental Results Is Most