Explanation: When a human takes part in an experiment, this human is called a "research participant" or a "human subject".
While is true that you may think in these humans as "variables" of some kind, this is not really the case because there is a whole different system, where you just can't do a change in your human subject as you want, so these people are not real "variables" in the experiment.
yan po ung nahanap ko at screenshot lang po yan tas basahin nyu lang po yan may makikita kayo jan tas yan po ung continue dahil indi kasya saking cp ang taas kc sa sagot nila ehh