Answer: Experiment
Step-by-step explanation:An experiment can be defined as the process carried out to prove a scientific logic. These experiments are done on the basis of predetermined procedure that is strictly followed.
In the given case, the individuals that are put in two different conditions are the samples for the experiment the investigator is doing on human behavior. Putting those individuals in a situation is the procedure.
Thus, we can conclude that the given case is an example of experiment.