Mark is currently conducting research studies for Enterprise and Avis, two national rental car companies. In fact, Mark has conducted studies for two other rental car companies in the past five years. Mark's actions represent a potential _____.
a. illegal situation
b. advocacy situation
c. push poll
d. conflict of interest
Question 2
The _______________ effect refers to the occurrence of specific events that are external to the experiment but that take place at the same time as the experiment.
a. history d. instrumentation
b. maturation e. statistical regression
c. testing