A researcher conducts a study in which participants are placed in a simulated prison and assigned to roles as prisoners and guards.As part of the experimental briefing he gives participants clues about the hypothesis he is testing and about how he wants them to behave.Which of the following may compromise the internal and external validity of the research?
A)Experimenter bias.
B)Demand characteristics.
C)Regression to the mean
D)Both (a)and (b).
E)All of the above.

Question

Quizplus · Accepted Answer

Experimenter bias and demand characteristics can both compromise the internal and external validity of a study, particularly if they give participants clues about the hypothesis or how they are expected to behave. Regression to the mean does not necessarily apply in this situation.

A Researcher Conducts a Study in Which Participants Are Placed