ExperimentalEffect
Experimental effect is an interesting phenomenon that occurs when researchers perform experiments. The accuracy of the experimental outcome turns out just as hypothesized or expected -- not because of the knowledge or the methods of the researchers, but because their expectations tend to affect the processes and results of the experiment. For example, a researcher who predicts that the outcome of the experiment will not be the expected one may take actions that make the unexpected result more likely, thus fulfilling the original hypothesis.
Question: The professor gives an example to illustrate the "experimental effect" phenomenon.Explain how this example is related to the reading passage.