Dr. Nielsen, a Fairview University psychology professor, is planning a study of the factors that affect the motivation of employees. Dr. Nielsen is concerned that the results of his experiments may be misleading because employees in an experimental group tend to behave differently when they know they are being studied. This concern shows that Dr. Nielsen is aware of the

The correct answer would be- Hawthorne effect.

Explanation:

Hawthorne effect is the theory or reactivity that refers to the group of people who alter their behavior while knowing that they are observed. This change in behavior can affect the research or study and it's variables.

Such an effect caused due to knowing to fact that they are being examined not by the changes in a variable. This is what that mess with the result of the research or the study.

Thus, the correct answer is - Hawthorne effect

are there any letter choices to this or is this an open ended question?