Which of the following influences on the experimental units can bias the results of an experiment?
A)Placebo effect
B)Hawthorne effect
C)Not being blinded
D)All of the above

Question

Quizplus · Accepted Answer

All of the listed influences on experimental units can bias the results of an experiment. The placebo effect is when the subject's belief in the treatment causes them to show an improvement in symptoms, regardless of the actual effectiveness of the treatment. The Hawthorne effect is when the subjects' behavior changes due to the awareness of being studied, rather than the treatment being tested. Not being blinded can introduce bias if the researchers or subjects have prior expectations or knowledge that could influence the results. Therefore, D, all of the above, is the best choice.

Which of the Following Influences on the Experimental Units Can